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Dr. Van Tuan Nguyen
National University of Civil Engineering

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Research Keywords & Expertise

0 ultra high performance concrete
0 Cement hydration
0 Recycling of industrial wastes and by-products
0 cement microstructure characterization
0 agricultural waste

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ultra high performance concrete
Construction & Demolition Waste recycling
Cement hydration
agricultural waste

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Conference paper
Published: 26 October 2020 in Lecture Notes in Civil Engineering
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The improvement of Carbon Nanotubes (CNTs) addition on the properties of concrete has been recently investigated, e.g. mechanical properties and durability, but is rarely reported for Ultra-High-Performance Concrete (UHPC) with a very low water to binder ratio. This study evaluates the effect of CNTs on chloride penetration in UHPC and some mechanical properties of this material. The results of experimental tests show that the addition of CNTs in UHPC with contents from 0% to 0.5% by weight of binder in UHPC will reduce the workability of the concrete mixture, and not significantly improve the compressive strength of UHPC under both standard curing and heat curing conditions. However, the results showed that the addition of CNTs improves the dense microstructure of both the UHPC matrix and interfacial transition zone, and resulting in reducing the chloride penetration in UHPC. This is very important in cases of using UHPC for the constructions working under extreme conditions such as on a coastal, island, or underground structures with water erosion.

ACS Style

Pham Manh Hao; Nguyen Van Tuan; Nguyen Cong Thang; Nguyen Van Thao; Luong Nhu Hai; Pham Sy Dong; Nguyen Xuan Man; Ngo Ngoc Thuy. Effect of Carbon Nanotubes on the Chloride Penetration in Ultra-High-Performance Concrete. Lecture Notes in Civil Engineering 2020, 69 -80.

AMA Style

Pham Manh Hao, Nguyen Van Tuan, Nguyen Cong Thang, Nguyen Van Thao, Luong Nhu Hai, Pham Sy Dong, Nguyen Xuan Man, Ngo Ngoc Thuy. Effect of Carbon Nanotubes on the Chloride Penetration in Ultra-High-Performance Concrete. Lecture Notes in Civil Engineering. 2020; ():69-80.

Chicago/Turabian Style

Pham Manh Hao; Nguyen Van Tuan; Nguyen Cong Thang; Nguyen Van Thao; Luong Nhu Hai; Pham Sy Dong; Nguyen Xuan Man; Ngo Ngoc Thuy. 2020. "Effect of Carbon Nanotubes on the Chloride Penetration in Ultra-High-Performance Concrete." Lecture Notes in Civil Engineering , no. : 69-80.

Conference paper
Published: 26 October 2020 in Lecture Notes in Civil Engineering
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Along with the development of the coal mining industry, a massive amount of waste rock has been exhausted. It does waste not only plenty of natural resources but also pollutes the environment, as well as occupying a large part of the land use for dumpsites. This paper focuses on the possibility of recycling waste rock in coal mining as an aggregate in producing concrete. Accordingly, the waste rock was crushed to produce fine and coarse aggregates, and then they were used to produce concrete. Besides, the natural aggregates were also taken into account to compare and evaluate the quality of the recycled concrete. The experimental results showed that aggregate samples with lithological composition and indicators of the alkali-silica reaction were completely compatible with natural aggregates. They met requirements in producing mortar and concrete. Another finding in this study is the waste rock with compressive strength of over 100 MPa was suitable for coarse aggregate for producing concrete. Finally, when using recycled aggregate from waste rocks of coal mining, it is possible to make concrete with compressive strength of over 30 MPa. Besides, the flexural strength, bond strength between steel bar and concrete, modulus of elasticity, and shrinkage deformation of concrete at long-term ages are not too dissimilar to those of concrete samples using natural aggregates.

ACS Style

Nguyen Cong Thang; Nguyen Van Tuan; Dao Ngoc Hiep; Vu Manh Thang. The Potential Use of Waste Rock from Coal Mining for the Application as Recycled Aggregate in Concrete. Lecture Notes in Civil Engineering 2020, 550 -561.

AMA Style

Nguyen Cong Thang, Nguyen Van Tuan, Dao Ngoc Hiep, Vu Manh Thang. The Potential Use of Waste Rock from Coal Mining for the Application as Recycled Aggregate in Concrete. Lecture Notes in Civil Engineering. 2020; ():550-561.

Chicago/Turabian Style

Nguyen Cong Thang; Nguyen Van Tuan; Dao Ngoc Hiep; Vu Manh Thang. 2020. "The Potential Use of Waste Rock from Coal Mining for the Application as Recycled Aggregate in Concrete." Lecture Notes in Civil Engineering , no. : 550-561.

Journal article
Published: 13 October 2020 in Applied Sciences
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This research investigated the effect of fly ash content on the compressive strength development of ultra-high-performance concrete (UHPC) at different curing conditions, i.e., the standard curing condition and the heat curing. A total of 20 mixtures were prepared to cast specimens to measure the compressive strength at different ages from 3 days to 180 days. Additionally, 300 specimens were prepared to estimate the appropriate heat curing period at the early ages in terms of enhancing the 28-day compressive strength of UHPC with high content of fly ash (FA). From the regression analysis using test data, empirical equations were formulated to assess the compressive strength development of UHPC considering the FA content and maturity function. Test results revealed that the preference of the addition of FA for enhancing the compressive strength of UHPC requires the early heat curing procedure which can be recommended as at least 2 days under 90 °C. Moreover, the compressive strength of UHPC with FA under heat curing mostly reached its 28-day strength within 3 days. The proposed models based on the fib 2010 model can be a useful tool to reliably assess the compressive strength development of UHPC with high-volume fly ash (HVFA) (up to 70% fly ash content) under a heat curing condition that possesses a different performance from that of normal- and high-strength concrete. When 50% of the cement content was replaced by FA, the embodied CO2 emission for UHPC mixture reduced up to approximately 50%, which is comparable to the CO2 emission calculated from the conventional normal-strength concrete.

ACS Style

Pham Sy Dong; Nguyen Van Tuan; Le Trung Thanh; Nguyen Cong Thang; Viet Hung Cu; Ju-Hyun Mun. Compressive Strength Development of High-Volume Fly Ash Ultra-High-Performance Concrete under Heat Curing Condition with Time. Applied Sciences 2020, 10, 7107 .

AMA Style

Pham Sy Dong, Nguyen Van Tuan, Le Trung Thanh, Nguyen Cong Thang, Viet Hung Cu, Ju-Hyun Mun. Compressive Strength Development of High-Volume Fly Ash Ultra-High-Performance Concrete under Heat Curing Condition with Time. Applied Sciences. 2020; 10 (20):7107.

Chicago/Turabian Style

Pham Sy Dong; Nguyen Van Tuan; Le Trung Thanh; Nguyen Cong Thang; Viet Hung Cu; Ju-Hyun Mun. 2020. "Compressive Strength Development of High-Volume Fly Ash Ultra-High-Performance Concrete under Heat Curing Condition with Time." Applied Sciences 10, no. 20: 7107.

Journal article
Published: 26 August 2020 in Materials
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This study examined the effectiveness of zeolite addition to reduce the autogenous shrinkage of high-performance cement-based concrete (HPC). The zeolites were replaced up to 15% of the cement content by weight and their mean particle size varied from 5.6 to 16.7 µm. To evaluate the crack resistance of HPC containing zeolites, the ring tests and internal relative humidity measurements were performed at different ages. The compressive strengths were determined at 3, 7, 28 and 90 days of curing. Test results confirmed that the addition of zeolite was promising and favourable in enhancing the compressive strength, crack resistance and reducing the autogenous shrinkage of HPC due to synergistic pozzolanic and internal curing effects. The autogenous shrinkage tended to decrease with the increase in zeolite content and its particle size. In addition, the extent of the autogenous shrinkage development at the early ages decreased with higher zeolite content replaced. Furthermore, to predict the autogenous shrinkage of HPC containing zeolite, an improved model has been proposed, in which the conventional ultimate autogenous shrinkage strain and time function were modified by introducing new parameters accounting for the zeolite content and its particle size. It appeared that the proposed model was able to capture the autogenous shrinkage behaviour of HPC with or without zeolite, while the fib 2010 model underestimated the autogenous shrinkage of HPC containing less than 10% zeolite replacement.

ACS Style

Nguyen Cong Thang; Nguyen Van Tuan; Keun-Hyeok Yang; Quoc Tri Phung. Effect of Zeolite on Shrinkage and Crack Resistance of High-Performance Cement-Based Concrete. Materials 2020, 13, 3773 .

AMA Style

Nguyen Cong Thang, Nguyen Van Tuan, Keun-Hyeok Yang, Quoc Tri Phung. Effect of Zeolite on Shrinkage and Crack Resistance of High-Performance Cement-Based Concrete. Materials. 2020; 13 (17):3773.

Chicago/Turabian Style

Nguyen Cong Thang; Nguyen Van Tuan; Keun-Hyeok Yang; Quoc Tri Phung. 2020. "Effect of Zeolite on Shrinkage and Crack Resistance of High-Performance Cement-Based Concrete." Materials 13, no. 17: 3773.

Conference paper
Published: 28 July 2020 in Lecture Notes in Civil Engineering
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Ultra High Performance Concrete (UHPC) is a new class of concrete that has gained a strong interest in research and application in the early 1990s, with outstanding properties such as a compressive strength in excess of 150 MPa and excellent durability. However, UHPC without any steel fiber exhibits low flexural strength and low crack resistance, even compared to that of high performance concrete, and the incorporation of steel fiber can compensate this disadvantages by bridging the crack at very small crack openings, transferring stresses and developing post crack strength in the concrete. This paper presents the effect of using steel fibers in enhancing the flexural strength and limiting of the crack-mouth opening displacement. The experimental results show that the incorporation of 3% steel fiber increases significantly flexural strength, up to 135%, and greatly limited the cracking due to the shrinkage, up to 8 times longer in comparable with those of the control sample.

ACS Style

Cong Thang Nguyen; Huu Hanh Pham; Van Tuan Nguyen; Sy Dong Pham; Viet Hung Cu. Evaluating the Effect of Steel Fibers on Some Mechanical Properties of Ultra-High Performance Concrete. Lecture Notes in Civil Engineering 2020, 493 -501.

AMA Style

Cong Thang Nguyen, Huu Hanh Pham, Van Tuan Nguyen, Sy Dong Pham, Viet Hung Cu. Evaluating the Effect of Steel Fibers on Some Mechanical Properties of Ultra-High Performance Concrete. Lecture Notes in Civil Engineering. 2020; ():493-501.

Chicago/Turabian Style

Cong Thang Nguyen; Huu Hanh Pham; Van Tuan Nguyen; Sy Dong Pham; Viet Hung Cu. 2020. "Evaluating the Effect of Steel Fibers on Some Mechanical Properties of Ultra-High Performance Concrete." Lecture Notes in Civil Engineering , no. : 493-501.

Conference paper
Published: 28 July 2020 in Lecture Notes in Civil Engineering
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In recent decades, construction and demolition wastes (CDW) have caused serious environmental problems for many countries in the world, including Vietnam. Those problems can be solved by making use of CDW as building materials. This paper focuses on a research work, where CDW, in the form of a mixture of brick and mortar, are burned into lightweight aggregates (LWA), which are used for making lightweight concretes (LWC). The paper describes how LWC are produced using the LWA from CDW and presents their mechanical properties, including compressive strength and elastic modulus by experimental tests. It has been shown that it is possible to use LWA recycled from CDW to make LWC with the density less than 1800 kg/m3 and 28 day-compressive strength up to 25 MPa. The mechanical properties of LWC are significantly influenced by the volume and size of the LWA used in the experiments. In practical application, these LWCs are expected to be used for making LWC slabs and walls to use for the construction of buildings.

ACS Style

Hung Phong Nguyen; Ngoc Lan Le; Cong Thang Nguyen; Van Tuan Nguyen; Tuan Trung Nguyen; Xuan Hien Nguyen. Lightweight Concrete Using Lightweight Aggregates from Construction and Demolition Wastes—Production and Properties. Lecture Notes in Civil Engineering 2020, 581 -588.

AMA Style

Hung Phong Nguyen, Ngoc Lan Le, Cong Thang Nguyen, Van Tuan Nguyen, Tuan Trung Nguyen, Xuan Hien Nguyen. Lightweight Concrete Using Lightweight Aggregates from Construction and Demolition Wastes—Production and Properties. Lecture Notes in Civil Engineering. 2020; ():581-588.

Chicago/Turabian Style

Hung Phong Nguyen; Ngoc Lan Le; Cong Thang Nguyen; Van Tuan Nguyen; Tuan Trung Nguyen; Xuan Hien Nguyen. 2020. "Lightweight Concrete Using Lightweight Aggregates from Construction and Demolition Wastes—Production and Properties." Lecture Notes in Civil Engineering , no. : 581-588.

Conference paper
Published: 28 July 2020 in Lecture Notes in Civil Engineering
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Ultra High Performance Concrete (UHPC) is a new class of concrete that has been developed in recent decades for its exceptional properties of strength and durability. The production of UHPC normally requires the use of large amounts of cement that results in the unsustainable development of this concrete system. Therefore, the study of the use of mineral admixtures will be a good solution to reduce cement consumption while improving the properties of the UHPC is of great practical significance in terms of sustainable construction development. The objective of this study is to use a high volume of fly ash to replace cement for the production of UHPC under both standard- and heat treatment- curing conditions. The results show that it is possible to use fly ash up to 40 and 50% by mass of binder under standard curing conditions and heat treatment conditions, respectively, to make the UHPC with the 28d-compressive strength of over 120 MPa. It means that up to 60% of binder (10% silica fume and 50% fly ash) can be used to produce the low cement ultra high performance concrete.

ACS Style

Sy Dong Pham; Van Tuan Nguyen; Trung Thanh Le; Cong Thang Nguyen. Possibility of Using High Volume Fly Ash to Produce Low Cement Ultra High Performance Concrete. Lecture Notes in Civil Engineering 2020, 589 -597.

AMA Style

Sy Dong Pham, Van Tuan Nguyen, Trung Thanh Le, Cong Thang Nguyen. Possibility of Using High Volume Fly Ash to Produce Low Cement Ultra High Performance Concrete. Lecture Notes in Civil Engineering. 2020; ():589-597.

Chicago/Turabian Style

Sy Dong Pham; Van Tuan Nguyen; Trung Thanh Le; Cong Thang Nguyen. 2020. "Possibility of Using High Volume Fly Ash to Produce Low Cement Ultra High Performance Concrete." Lecture Notes in Civil Engineering , no. : 589-597.

Conference paper
Published: 10 July 2020 in IOP Conference Series: Materials Science and Engineering
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ACS Style

Kim Tuan Ngo; Tien Dung Nguyen; Quang Minh Phan; Van Nguyen; Ken Kawamoto. Influence of AAC grains on some properties of permeable pavement utilizing of CDW and industrial by-product. IOP Conference Series: Materials Science and Engineering 2020, 869, 1 .

AMA Style

Kim Tuan Ngo, Tien Dung Nguyen, Quang Minh Phan, Van Nguyen, Ken Kawamoto. Influence of AAC grains on some properties of permeable pavement utilizing of CDW and industrial by-product. IOP Conference Series: Materials Science and Engineering. 2020; 869 ():1.

Chicago/Turabian Style

Kim Tuan Ngo; Tien Dung Nguyen; Quang Minh Phan; Van Nguyen; Ken Kawamoto. 2020. "Influence of AAC grains on some properties of permeable pavement utilizing of CDW and industrial by-product." IOP Conference Series: Materials Science and Engineering 869, no. : 1.

Journal article
Published: 01 July 2020 in International Journal of GEOMATE
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ACS Style

Akihiro Matsuno; Van Nguyen. COMPARISON OF MACROPORE STRUCTURES AND NETWORKS OF AUTOCLAVED AERATED CONCRETE BLOCKS USING MICRO-FOCUS X-RAY COMPUTED TOMOGRAPHY. International Journal of GEOMATE 2020, 19, 1 .

AMA Style

Akihiro Matsuno, Van Nguyen. COMPARISON OF MACROPORE STRUCTURES AND NETWORKS OF AUTOCLAVED AERATED CONCRETE BLOCKS USING MICRO-FOCUS X-RAY COMPUTED TOMOGRAPHY. International Journal of GEOMATE. 2020; 19 (71):1.

Chicago/Turabian Style

Akihiro Matsuno; Van Nguyen. 2020. "COMPARISON OF MACROPORE STRUCTURES AND NETWORKS OF AUTOCLAVED AERATED CONCRETE BLOCKS USING MICRO-FOCUS X-RAY COMPUTED TOMOGRAPHY." International Journal of GEOMATE 19, no. 71: 1.

Journal article
Published: 29 January 2019 in International Journal of Concrete Structures and Materials
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The objective of this study is to examine the workability and various mechanical properties of concrete using artificial lightweight aggregates produced from expanded bottom ash and dredged soil. Fifteen concrete mixes were classified into three groups with regard to the designed compressive strengths corresponding to 18 MPa, 24 MPa, and 35 MPa. In each group, lightweight fine aggregates were replaced by using natural sand from 0 to 100% at an interval of 25%. Thus, the density of concrete ranged between 1455 and 1860 kg/m3. Based on the regression analysis using test data, a reliable model was proposed to clarify lower early-age strength and higher long-term strength gains of lightweight aggregate concrete (LWAC) when compared with the predictions of the fib model. The proposed model also indicates that a lower water-to-cement ratio is required with the decrease in the natural sand content to achieve the designed compressive strength of concrete. The partial use natural sand is favorable for enhancing the tensile resistance capacity, shear friction strength, and bond behavior with a reinforcing bar of LWAC. The fib model overestimates direct tensile strength, bond strength and the amount of slip at the peak bond stress of LWAC. Therefore, it is necessary to consider the density of concrete as a critical factor in conjunction with its compressive strength to rationally evaluate the various mechanical properties of LWAC.

ACS Style

Kyung-Ho Lee; Keun-Hyeok Yang; Ju-Hyun Mun; Van Nguyen. Effect of Sand Content on the Workability and Mechanical Properties of Concrete Using Bottom Ash and Dredged Soil-based Artificial Lightweight Aggregates. International Journal of Concrete Structures and Materials 2019, 13, 13 .

AMA Style

Kyung-Ho Lee, Keun-Hyeok Yang, Ju-Hyun Mun, Van Nguyen. Effect of Sand Content on the Workability and Mechanical Properties of Concrete Using Bottom Ash and Dredged Soil-based Artificial Lightweight Aggregates. International Journal of Concrete Structures and Materials. 2019; 13 (1):13.

Chicago/Turabian Style

Kyung-Ho Lee; Keun-Hyeok Yang; Ju-Hyun Mun; Van Nguyen. 2019. "Effect of Sand Content on the Workability and Mechanical Properties of Concrete Using Bottom Ash and Dredged Soil-based Artificial Lightweight Aggregates." International Journal of Concrete Structures and Materials 13, no. 1: 13.

Journal article
Published: 01 December 2018 in International Journal of GEOMATE
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ACS Style

Van Nguyen. CURRENT STATUS OF CONSTRUCTION AND DEMOLITION WASTE MANAGEMENT IN VIETNAM: CHALLENGES AND OPPORTUNITIES. International Journal of GEOMATE 2018, 16, 1 .

AMA Style

Van Nguyen. CURRENT STATUS OF CONSTRUCTION AND DEMOLITION WASTE MANAGEMENT IN VIETNAM: CHALLENGES AND OPPORTUNITIES. International Journal of GEOMATE. 2018; 16 (52):1.

Chicago/Turabian Style

Van Nguyen. 2018. "CURRENT STATUS OF CONSTRUCTION AND DEMOLITION WASTE MANAGEMENT IN VIETNAM: CHALLENGES AND OPPORTUNITIES." International Journal of GEOMATE 16, no. 52: 1.

Book chapter
Published: 09 December 2017 in RILEM State-of-the-Art Reports
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ACS Style

Guang Ye; Hao Huang; Nguyen Van Tuan. Rice Husk Ash. RILEM State-of-the-Art Reports 2017, 283 -302.

AMA Style

Guang Ye, Hao Huang, Nguyen Van Tuan. Rice Husk Ash. RILEM State-of-the-Art Reports. 2017; ():283-302.

Chicago/Turabian Style

Guang Ye; Hao Huang; Nguyen Van Tuan. 2017. "Rice Husk Ash." RILEM State-of-the-Art Reports , no. : 283-302.

Journal article
Published: 01 October 2014 in Key Engineering Materials
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Autogenous shrinkage strains may cause cracking of brittle cement-based systems. The lower the water/cement ratio of a mixture, the higher the autogenous shrinkage and the higher the probability of cracking. Cracking increases the probability of ingress of aggressive substances into the concrete, jeopardizing the durability of the material. Low water/cement ratios, however, result in a dense microstructure, which is one of the desired features of high performance concrete because of the assumed increase in durability. This results in a kind of dilemma: the high density of low water/cement ratio concretes is desired, but the increased risk of (micro) cracking of these mixtures, of course, not. This dilemma is discussed in this contribution. The search for ways to get out of this dilemma starts with understanding the mechanisms of autogenous shrinkage. It is shown that autogenous shrinkage is not only an issue in low water/cement ratio mixtures. In normal strength concretes, with w/c ratios between 0.40 – 0.50, autogenous shrinkage can make out a substantial part of the total strain. Ways to mitigate autogenous shrinkage of mixtures with water/binder ratios ranging from 0.18 to 0.50 are discussed. Finally brief comments are made on autogenous shrinkage values prescribed in current design codes.

ACS Style

Klaas Van Breugel; Van Nguyen. Autogenous Shrinkage of HPC and Ways to Mitigate it. Key Engineering Materials 2014, 629-630, 3 -20.

AMA Style

Klaas Van Breugel, Van Nguyen. Autogenous Shrinkage of HPC and Ways to Mitigate it. Key Engineering Materials. 2014; 629-630 ():3-20.

Chicago/Turabian Style

Klaas Van Breugel; Van Nguyen. 2014. "Autogenous Shrinkage of HPC and Ways to Mitigate it." Key Engineering Materials 629-630, no. : 3-20.

Journal article
Published: 14 June 2013 in Materials and Structures
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ACS Style

Viktor Mechtcherine; Michaela Gorges; Christof Schroefl; Alexander Assmann; Wolfgang Brameshuber; António Bettencourt Ribeiro; Daniel Cusson; João Custódio; Eugênia Fonseca Da Silva; Kazuo Ichimiya; Shin-Ichi Igarashi; Agnieszka Klemm; Konstantin Kovler; Anne Neiry De Mendonça Lopes; Pietro Lura; Van Tuan Nguyen; Hans-Wolf Reinhardt; Romildo Toledo Filho; William Weiss; Mateusz Wyrzykowski; Guang Ye; Semion Zhutovsky. Effect of internal curing by using superabsorbent polymers (SAP) on autogenous shrinkage and other properties of a high-performance fine-grained concrete: results of a RILEM round-robin test. Materials and Structures 2013, 47, 541 -562.

AMA Style

Viktor Mechtcherine, Michaela Gorges, Christof Schroefl, Alexander Assmann, Wolfgang Brameshuber, António Bettencourt Ribeiro, Daniel Cusson, João Custódio, Eugênia Fonseca Da Silva, Kazuo Ichimiya, Shin-Ichi Igarashi, Agnieszka Klemm, Konstantin Kovler, Anne Neiry De Mendonça Lopes, Pietro Lura, Van Tuan Nguyen, Hans-Wolf Reinhardt, Romildo Toledo Filho, William Weiss, Mateusz Wyrzykowski, Guang Ye, Semion Zhutovsky. Effect of internal curing by using superabsorbent polymers (SAP) on autogenous shrinkage and other properties of a high-performance fine-grained concrete: results of a RILEM round-robin test. Materials and Structures. 2013; 47 (3):541-562.

Chicago/Turabian Style

Viktor Mechtcherine; Michaela Gorges; Christof Schroefl; Alexander Assmann; Wolfgang Brameshuber; António Bettencourt Ribeiro; Daniel Cusson; João Custódio; Eugênia Fonseca Da Silva; Kazuo Ichimiya; Shin-Ichi Igarashi; Agnieszka Klemm; Konstantin Kovler; Anne Neiry De Mendonça Lopes; Pietro Lura; Van Tuan Nguyen; Hans-Wolf Reinhardt; Romildo Toledo Filho; William Weiss; Mateusz Wyrzykowski; Guang Ye; Semion Zhutovsky. 2013. "Effect of internal curing by using superabsorbent polymers (SAP) on autogenous shrinkage and other properties of a high-performance fine-grained concrete: results of a RILEM round-robin test." Materials and Structures 47, no. 3: 541-562.

Journal article
Published: 30 November 2011 in Cement and Concrete Research
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Rice husk ash (RHA) and silica fume (SF) have a similar chemical composition and a very high specific surface area, but RHA is not an ultra-fine material like SF. The high specific surface area of RHA originates from its internal porosity. For this reason RHA can be expected to behave differently from SF in terms of the hydration and the resulting microstructure of concrete. This still remains unclear in Ultra High Performance Concrete (UHPC). The objective of this research was to study the effect of RHA on the hydration and microstructure development of UHPC. The results are compared to those obtained with a control sample and a sample made with SF. The results show that the addition of RHA can increase the degree of cement hydration in UHPC at later ages. RHA can also refine the pore structure of UHPC and reduce the Ca(OH)2 content, but less significantly than SF. The thickness of the interface transition zone (ITZ) between sand particles and cement matrix of all samples is very small at the age of 28 days. The compressive strength of the sample made with RHA after 7 days was higher than that of the control sample and the sample made with SF. It is suggested that the porous structure of RHA and the uptake of water in this porous structure results in a kind of is attributable to the internal water curing of the RHA modified mixture.

ACS Style

Nguyen Van Tuan; Guang Ye; Klaas Van Breugel; Oguzhan Copuroglu. Hydration and microstructure of ultra high performance concrete incorporating rice husk ash. Cement and Concrete Research 2011, 41, 1104 -1111.

AMA Style

Nguyen Van Tuan, Guang Ye, Klaas Van Breugel, Oguzhan Copuroglu. Hydration and microstructure of ultra high performance concrete incorporating rice husk ash. Cement and Concrete Research. 2011; 41 (11):1104-1111.

Chicago/Turabian Style

Nguyen Van Tuan; Guang Ye; Klaas Van Breugel; Oguzhan Copuroglu. 2011. "Hydration and microstructure of ultra high performance concrete incorporating rice husk ash." Cement and Concrete Research 41, no. 11: 1104-1111.

Journal article
Published: 30 April 2011 in Construction and Building Materials
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The limited available resource and the high cost of silica fume (SF) in producing ultra high performance concrete (UHPC) give the motivation for searching for the substitution by other materials with similar functions, especially in developing countries. Rice husk ash (RHA), an agricultural waste, is classified as “a highly active pozzolan” because it possesses a very high amount of amorphous SiO2 and a large surface area. The possibility of using RHA to produce UHPC was investigated in this study. The result shows that the compressive strength of UHPC incorporating RHA, with the mean size between 3.6 μm and 9 μm, can be achieved in excess of 150 MPa with normal curing regime. The interesting point is that the effect of RHA on the development of compressive strength of UHPC is larger than that of SF. Besides, the sample incorporating the ternary blend of cement with 10% RHA and 10% SF showed better compressive strength than that of the control sample without RHA or SF. This blend proved to be the optimum combination for achieving maximum synergic effect.

ACS Style

Nguyen Van Tuan; Guang Ye; Klaas van Breugel; Alex L.A. Fraaij; Danh Dai Bui. The study of using rice husk ash to produce ultra high performance concrete. Construction and Building Materials 2011, 25, 2030 -2035.

AMA Style

Nguyen Van Tuan, Guang Ye, Klaas van Breugel, Alex L.A. Fraaij, Danh Dai Bui. The study of using rice husk ash to produce ultra high performance concrete. Construction and Building Materials. 2011; 25 (4):2030-2035.

Chicago/Turabian Style

Nguyen Van Tuan; Guang Ye; Klaas van Breugel; Alex L.A. Fraaij; Danh Dai Bui. 2011. "The study of using rice husk ash to produce ultra high performance concrete." Construction and Building Materials 25, no. 4: 2030-2035.