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Dr. Abdul Buller
Assistant Professor @ Quaid-e-Awam University of Science and technology, Nawabshah, Sindh, Pakistan

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Research Keywords & Expertise

0 Fiber Reinforced Concrete
0 Self Healing Concrete
0 Lightweight Concrete
0 Mechanical and durability performance of self healing concrete
0 Self compacting concrete

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Lightweight Concrete
Mechanical and durability performance of self healing concrete

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Short Biography

Currently, I am working as Assistant Professor @ the Quaid-e-Awam University of Engineering, Science, and Technology Nawabshah, Pakistan. I completed my Ph.D. at Sungkyunkwan University, South Korea. My research area was mechanical and durability performance of Fiber-Reinforced mortar using different crystalline materials at short-term healing duration. I published Two SCI papers and 5 Conference papers during my doctoral degree. I am also interested in 3D-Concrete printing, Self-Compacting Concrete, Artificial intelligence in concrete

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Conference
Andong, South Korea
Date: 10-13 January 2021
Has been a speaker at the conference:
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Abdul Buller
Journal article
Published: 24 August 2021 in Sustainability
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Concrete is a popular building material all over the world, but because of different physiochemical processes, it is susceptible to crack development. One of the primary deterioration processes of reinforced concrete buildings is corrosion of steel bars within the concrete through these cracks. In this regard, a self-healing technique for crack repair would be the best solution to reduce the penetration of chloride ions inside concrete mass. In this study, a rapid chloride migration (RCM) test was conducted to determine the self-healing capacity of cracked mortar. With the help of the RCM test, the steady-state migration coefficient of cracked and uncracked specimens incorporating expansive and crystalline admixtures was calculated. Based on the rate of change of the chloride ion concentrations in the steady-state condition, the migration coefficient was calculated. Furthermore, bulk electrical conductivity tests were also conducted before and after the migration test to understand the self-healing behavior. It was evident from the test results that the self-healing of cracks was helpful to reduce the penetration of chloride ions and that it enhanced the ability of cracked mortar to restrict the chloride ingress. Using this test method, the self-healing capacity of the new self-healing technologies can be evaluated. The RCM test can be an acceptable technique to assess the self-healing ability of cement-based materials in a very short period, and the self-healing capacity can be characterized in terms of the decrease of chloride migration coefficients.

ACS Style

Fahad Ul Rehman Abro; Abdul Salam Buller; Tariq Ali; Zain Ul-Abdin; Zaheer Ahmed; Noor Ahmed Memon; Ali Raza Lashari. Autogenous Healing of Cracked Mortar Using Modified Steady-State Migration Test against Chloride Penetration. Sustainability 2021, 13, 9519 .

AMA Style

Fahad Ul Rehman Abro, Abdul Salam Buller, Tariq Ali, Zain Ul-Abdin, Zaheer Ahmed, Noor Ahmed Memon, Ali Raza Lashari. Autogenous Healing of Cracked Mortar Using Modified Steady-State Migration Test against Chloride Penetration. Sustainability. 2021; 13 (17):9519.

Chicago/Turabian Style

Fahad Ul Rehman Abro; Abdul Salam Buller; Tariq Ali; Zain Ul-Abdin; Zaheer Ahmed; Noor Ahmed Memon; Ali Raza Lashari. 2021. "Autogenous Healing of Cracked Mortar Using Modified Steady-State Migration Test against Chloride Penetration." Sustainability 13, no. 17: 9519.

Journal article
Published: 27 May 2021 in Crystals
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In today’s world, the implementation of industrial ecology for sustainable industrial development is a common practice in the field of engineering. This practice promotes the recycling of by-product wastes. One of those by-product wastes is rice husk ash. This paper describes an investigation into the effect of rice husk ash (RHA) as a partial replacement for cement, to produce lightweight, aerated concrete. Type I Portland cement, fine aggregate, and aluminum powder as an aerating agent were used in this study. The RHA was used in different replacement levels, i.e., RHA was used to replace cement at 0%, 2.5%, 5%, 7.5%, 10%, 12.5% and 15% by weight. Aluminum powder was added during mixing at 0.5% by weight of binder to obtain lightweight, aerated concrete. Test results are presented in terms of physical, mechanical, and durability aspects that include density, compressive strength, split tensile strength, and flexural strength of concrete cured at different curing regimes, i.e., 3, 7, 28, and 90 days along with corrosion analysis, and sulphate attack at 28 days of curing. The test results show that using 10% RHA as a partial replacement of cement in aerated concrete is beneficial in triggering the strength and durability properties of concrete.

ACS Style

Tariq Ali; Abdullah Saand; Daddan Bangwar; Abdul Buller; Zaheer Ahmed. Mechanical and Durability Properties of Aerated Concrete Incorporating Rice Husk Ash (RHA) as Partial Replacement of Cement. Crystals 2021, 11, 604 .

AMA Style

Tariq Ali, Abdullah Saand, Daddan Bangwar, Abdul Buller, Zaheer Ahmed. Mechanical and Durability Properties of Aerated Concrete Incorporating Rice Husk Ash (RHA) as Partial Replacement of Cement. Crystals. 2021; 11 (6):604.

Chicago/Turabian Style

Tariq Ali; Abdullah Saand; Daddan Bangwar; Abdul Buller; Zaheer Ahmed. 2021. "Mechanical and Durability Properties of Aerated Concrete Incorporating Rice Husk Ash (RHA) as Partial Replacement of Cement." Crystals 11, no. 6: 604.

Journal article
Published: 07 January 2021 in Processes
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Coprecipitation-adsorption plays a significant role during coagulation-flocculation-sedimentation (C/F/S) of antimony (Sb) in water. This work uses a Box–Behnken statistical experiment design (BBD) and response surface methodology (RSM) to investigate the effects of major operating variables such as initial Sb(III, V) concentration (100–1000 µg/L), ferric chloride (FC) dose (5–50 mg/L), and pH (4–10) on redox Sb species. Experimental data of Sb(III, V) removal were used to determine response function coefficients. The model response value (Sb removal) showed good agreement with the experimental results. FC showed promising coagulation behavior of both Sb species under optimum pH (6.5–7.5) due to its high affinity towards Sb species and low residual Fe concentration. However, a high dose of 50 mg/L of FC is required for the maximum (88–93%) removal of Sb(V), but also for the highest (92–98%) removal of low initial concentrations of Sb(III). Furthermore, BBD and RSM were found to be reliable and feasible for determining the optimum conditions for Sb removal from environmental water samples by a C/F/S process. This work may contribute to a better understanding and prediction of the C/F/S behavior of Sb(III, V) species in aqueous environments, to reduce potential risks to humans.

ACS Style

Muhammad Ali Inam; Rizwan Khan; Ick Tae Yeom; Abdul Salam Buller; Muhammad Akram; Muhammad Waleed Inam. Optimization of Antimony Removal by Coagulation-Flocculation-Sedimentation Process Using Response Surface Methodology. Processes 2021, 9, 117 .

AMA Style

Muhammad Ali Inam, Rizwan Khan, Ick Tae Yeom, Abdul Salam Buller, Muhammad Akram, Muhammad Waleed Inam. Optimization of Antimony Removal by Coagulation-Flocculation-Sedimentation Process Using Response Surface Methodology. Processes. 2021; 9 (1):117.

Chicago/Turabian Style

Muhammad Ali Inam; Rizwan Khan; Ick Tae Yeom; Abdul Salam Buller; Muhammad Akram; Muhammad Waleed Inam. 2021. "Optimization of Antimony Removal by Coagulation-Flocculation-Sedimentation Process Using Response Surface Methodology." Processes 9, no. 1: 117.

Journal article
Published: 09 October 2019 in Engineering, Technology & Applied Science Research
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It is well-accepted fact that in concrete construction, the self-weight of the structure is a major part of its total load. Reduction in the unit weight of the concrete results in many advantages. The structural lightweight aggregate concrete (LWAC) of adequate strength is now very common in use. In frame structures, the partition walls are free of any loading, where the construction of these non-structural elements with lightweight concrete of low strength would lead to the subsequent reduction of the overall weight of the structure. No-fines concrete is one of the forms of lightweight concrete and it is porous in nature. It can be manufactured similarly as normal concrete but with only coarse aggregates and without the sand. Thus, it has only two main ingredients; the coarse aggregates and the cement. The coarse aggregates are coated with a thin cement paste layer without fine sand. This is a detailed experimental study carried on NFC with fixed cement to the aggregate proportion of 1:6 with w/c 0.40 ratio. In this study, coarse aggregate of various gradations (7-4.75) mm, (10-4.75) mm, (10-7) mm, (13-4.74) mm, (10-7) mm, (13-4.75) mm, (13-10) mm, (13-7) mm, (20-4.75) mm, (20-7) mm, (20-10) mm, (20-13) mm, are used, where prefix and suffix show the maximum and minimum size of the aggregate. The cube and cylinder specimens of standard sizes are cast to determine the compressive strength and splitting tensile and the specimens are cured in water up to the age of testing (28 days).

ACS Style

Z. A. Tunio; F. U. R. Abro; T. Ali; Abdul Buller; M. A. Abbasi. Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part I: No-Fines Concrete. Engineering, Technology & Applied Science Research 2019, 9, 4612 -4615.

AMA Style

Z. A. Tunio, F. U. R. Abro, T. Ali, Abdul Buller, M. A. Abbasi. Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part I: No-Fines Concrete. Engineering, Technology & Applied Science Research. 2019; 9 (5):4612-4615.

Chicago/Turabian Style

Z. A. Tunio; F. U. R. Abro; T. Ali; Abdul Buller; M. A. Abbasi. 2019. "Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part I: No-Fines Concrete." Engineering, Technology & Applied Science Research 9, no. 5: 4612-4615.

Journal article
Published: 09 October 2019 in Engineering, Technology & Applied Science Research
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This study aims to investigate the effect of different gradations of coarse aggregates on mechanical properties of no-fines concrete (NFC). NFC reduces a structure’s self-weight, thus minimizing cost. The effects of coarse aggregate gradation on mechanical properties such as compressive strength, split tensile strength, and flexural strength were studied and compared at the end of 28-day water curing. A fixed cement- to-aggregate proportion 1:6 with 0.5 water/cement (w/c) ratio was adopted. Four gradations of coarse aggregates ranging between specific maximum and minimum size were used, namely 5mm-4mm, 10mm-4mm, 20mm-4mm and 20mm-15mm. The results of this study reveal the substantial effect of the gradation of coarse aggregates on strength properties compressive and tensile strength of NFC.

ACS Style

Abdul Buller; Z. A. Tunio; Fahad Ul Rehman Abro; T. Ali; K. A. Jamali. Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part II: No-Fines Vs. Ordinary Concrete. Engineering, Technology & Applied Science Research 2019, 9, 4623 -4626.

AMA Style

Abdul Buller, Z. A. Tunio, Fahad Ul Rehman Abro, T. Ali, K. A. Jamali. Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part II: No-Fines Vs. Ordinary Concrete. Engineering, Technology & Applied Science Research. 2019; 9 (5):4623-4626.

Chicago/Turabian Style

Abdul Buller; Z. A. Tunio; Fahad Ul Rehman Abro; T. Ali; K. A. Jamali. 2019. "Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part II: No-Fines Vs. Ordinary Concrete." Engineering, Technology & Applied Science Research 9, no. 5: 4623-4626.

Research article
Published: 22 September 2019 in Advances in Materials Science and Engineering
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This research is sought to characterize the stimulated autogenous healing of fiber-reinforced mortars that incorporate healing agents such as crystalline admixtures, expansive agents, and geomaterials. The effects of the healing materials on mechanical performance and water permeability were evaluated experimentally. Furthermore, microscopic and microstructural observations were conducted to investigate the characteristics and physical appearance of healing products within healed cracks. Test results are presented herein regarding index of strength recovery (ISR), index of damage recovery (IDR) and index of dissipation energy gain (IDEG) in relation to crack healing, and reduction of water flow rate. The self-healing capability of the mortars was greater in terms of resisting water flow rather than recovering mechanical performance likely because water flow depends on surface crack sealing, whereas mechanical performance depends on bonding capacity as well as full-depth healing of cracks; thus, mechanical performance may further be improved after longer healing duration.

ACS Style

Abdul Salam Buller; Fahad Ul Rehman Abro; Kwang-Myong Lee; Seung Yup Jang. Mechanical Recovery of Cracked Fiber-Reinforced Mortar Incorporating Crystalline Admixture, Expansive Agent, and Geomaterial. Advances in Materials Science and Engineering 2019, 2019, 1 -14.

AMA Style

Abdul Salam Buller, Fahad Ul Rehman Abro, Kwang-Myong Lee, Seung Yup Jang. Mechanical Recovery of Cracked Fiber-Reinforced Mortar Incorporating Crystalline Admixture, Expansive Agent, and Geomaterial. Advances in Materials Science and Engineering. 2019; 2019 ():1-14.

Chicago/Turabian Style

Abdul Salam Buller; Fahad Ul Rehman Abro; Kwang-Myong Lee; Seung Yup Jang. 2019. "Mechanical Recovery of Cracked Fiber-Reinforced Mortar Incorporating Crystalline Admixture, Expansive Agent, and Geomaterial." Advances in Materials Science and Engineering 2019, no. : 1-14.

Journal article
Published: 10 August 2019 in Construction and Building Materials
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Since the advent of Mechanistic-Empirical Pavement Design Guide (M-EPDG), characterisation of asphalt concrete (AC) mixtures using flow number remains the topic of interest for most of the literature. Consequently, many flow number models have been proposed in the literature, which only caters AC mixtures that attain the tertiary stage of permanent deformation (PD). The literature is devoid of any study that ascertain, whether an AC mix would attain the tertiary stage of PD or otherwise. As such, this study develops a binary logistic model as a function of volumetric and performance parameters of field and laboratory prepared AC mixtures using the standard maximum likelihood procedure. The logistic model specification is best suited to predict the mix probability of attaining the tertiary stage of PD. More specifically, an increase in air voids and percent passing sieve #200 in the mix and relatively low value of dynamic modulus translated into an increased probability of attaining the tertiary stage of PD. The field and laboratory mixtures are compared using the binary logistic model and a sensitivity analysis is also performed on the model. The comparison reveals the difference in both the type of mixtures, and suggests optimising and customising the laboratory mixtures to the field conditions.

ACS Style

Yasir Ali; Muhammad Irfan; Abdul Salam Buller; Hammad A. Khan; Hafiz M.F. Gul. A binary logistic model for predicting the tertiary stage of permanent deformation of conventional asphalt concrete mixtures. Construction and Building Materials 2019, 227, 116608 .

AMA Style

Yasir Ali, Muhammad Irfan, Abdul Salam Buller, Hammad A. Khan, Hafiz M.F. Gul. A binary logistic model for predicting the tertiary stage of permanent deformation of conventional asphalt concrete mixtures. Construction and Building Materials. 2019; 227 ():116608.

Chicago/Turabian Style

Yasir Ali; Muhammad Irfan; Abdul Salam Buller; Hammad A. Khan; Hafiz M.F. Gul. 2019. "A binary logistic model for predicting the tertiary stage of permanent deformation of conventional asphalt concrete mixtures." Construction and Building Materials 227, no. : 116608.

Journal article
Published: 09 June 2019 in Materials
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Interest in self-healing-crack technologies for cement-based materials has been growing, but research into such materials remains in the early stage of development and standardized methods for evaluating healing capacity have not yet been established. Therefore, this study proposes a test method to evaluate the self-healing capacity of cement-based materials in terms of their resistance to chloride penetration. For this purpose, the steady-state chloride migration test has been used to measure the diffusion coefficients of cracked mortar specimens containing crystalline, expansive, and swelling admixtures. The results of the present study show that the time to reach a quasi-steady-state decreased and the diffusion coefficients increased as the potential increased because of the potential drop inside the migration cell and self-healing that occurred during the test. Therefore, use of a high potential is recommended to minimize the test duration, as long as the temperature does not rise too much during the test. Using this test method, the self-healing capacity of the new self-healing technologies can be evaluated, and an index of self-healing capacity is proposed based on the rate of charged chloride ions passing through a crack.

ACS Style

Fahad Ul Rehman Abro; Abdul Salam Buller; Kwang-Myong Lee; Seung Yup Jang. Using the Steady-State Chloride Migration Test to Evaluate the Self-Healing Capacity of Cracked Mortars Containing Crystalline, Expansive, and Swelling Admixtures. Materials 2019, 12, 1865 .

AMA Style

Fahad Ul Rehman Abro, Abdul Salam Buller, Kwang-Myong Lee, Seung Yup Jang. Using the Steady-State Chloride Migration Test to Evaluate the Self-Healing Capacity of Cracked Mortars Containing Crystalline, Expansive, and Swelling Admixtures. Materials. 2019; 12 (11):1865.

Chicago/Turabian Style

Fahad Ul Rehman Abro; Abdul Salam Buller; Kwang-Myong Lee; Seung Yup Jang. 2019. "Using the Steady-State Chloride Migration Test to Evaluate the Self-Healing Capacity of Cracked Mortars Containing Crystalline, Expansive, and Swelling Admixtures." Materials 12, no. 11: 1865.

Journal article
Published: 21 May 2019 in Civil Engineering Journal
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This paper is aimed to evaluate the effect of mould size on compressive strength of concrete cubes made with recyclable concrete aggregates. Natural coarse aggregates were replaced with 50% recycled aggregates from old demolished concrete. Five different mould sizes were used to cast 420 concrete cubes using 1:2:4 mix and 0.55 water/cement ratio. In each size equal number of cubes was cured for 3, 7, 14 and 28-day. After curing, weight of cubes was determined followed by testing for compressive strength in universal load testing machine with gradually increasing load. From the obtained results the strength correction coefficients were computed keeping 28-day cured standard size cubes as control specimens. Also, numerical expression based on regression analysis was developed to predict the compressive strength using weight of cube, area of mould and curing age as input parameter. The numerical equation predicts the compressive strength very well with maximum of 10.86% error with respect to experimental results.

ACS Style

Bashir Ahmed Memon; Mahboob Oad; Abdul Hafeez Buller; Sajjad Ahmed Shar; Abdul Salam Buller; Fahad Ul Rehman Abro. Effect of Mould Size on Compressive Strength of Green Concrete Cubes. Civil Engineering Journal 2019, 5, 1181 -1188.

AMA Style

Bashir Ahmed Memon, Mahboob Oad, Abdul Hafeez Buller, Sajjad Ahmed Shar, Abdul Salam Buller, Fahad Ul Rehman Abro. Effect of Mould Size on Compressive Strength of Green Concrete Cubes. Civil Engineering Journal. 2019; 5 (5):1181-1188.

Chicago/Turabian Style

Bashir Ahmed Memon; Mahboob Oad; Abdul Hafeez Buller; Sajjad Ahmed Shar; Abdul Salam Buller; Fahad Ul Rehman Abro. 2019. "Effect of Mould Size on Compressive Strength of Green Concrete Cubes." Civil Engineering Journal 5, no. 5: 1181-1188.

Journal article
Published: 04 November 2018
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ACS Style

Abdul Buller. Mechanical Performance Evaluation of Fiber Reinforced Mortar Incorporating Self-healing Agents. 2018, 1 .

AMA Style

Abdul Buller. Mechanical Performance Evaluation of Fiber Reinforced Mortar Incorporating Self-healing Agents. . 2018; ():1.

Chicago/Turabian Style

Abdul Buller. 2018. "Mechanical Performance Evaluation of Fiber Reinforced Mortar Incorporating Self-healing Agents." , no. : 1.

Journal article
Published: 13 November 2017
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ACS Style

Abdul Buller. Evaluation of Self-Healing Performance of Fiber Reinforced Mortar Incorporating PVA Fibers. 2017, 1 .

AMA Style

Abdul Buller. Evaluation of Self-Healing Performance of Fiber Reinforced Mortar Incorporating PVA Fibers. . 2017; ():1.

Chicago/Turabian Style

Abdul Buller. 2017. "Evaluation of Self-Healing Performance of Fiber Reinforced Mortar Incorporating PVA Fibers." , no. : 1.