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The environmental and economic concerns pertaining to the construction industry have necessitated the development of sustainable concrete. Durability and strength are the two primary properties which determine the sustainability of concrete. This study evaluated the performance of self-cured concrete produced from local vesicular basalt porous aggregates. The durability indicators, porosity, permeability and pore size of the hardened concrete, were obtained from the water sorptivity (water permeability under capillary action) test, the water permeability under pressure action test and the Brunauer–Emmett–Teller (BET) surface area test and strength was evaluated in terms of compressive strength of concrete. The concrete specimens were produced with 10% porous vesicular basalt aggregate in replacement of coarse aggregate. The concrete specimens were tested at 3, 7 and 28 days. The self-curing effect on concrete strength was evaluated against water, air and membrane cured specimens, at surface/volume ratio of 26.4/40 and w/c ratio of 0.35/0.5. A 20% decrease in sorptivity coefficient, 10% increase in solid surface area and about 10% increase in compressive strength of the self-cured concrete was observed over the conventionally cured concrete. The study concludes that the addition of water-entrainment aggregates to concrete reduces water permeability, results in a finer pore structure of concrete and increases the quality and durability of concrete.
Mohd. Ahmed; Saeed AlQadhi; Saleh Alsulamy; Saiful Islam; Roohul Khan; Mohd. Danish. Development of Self-Cured Sustainable Concrete Using Local Water-Entrainment Aggregates of Vesicular Basalt. Sustainability 2021, 13, 6756 .
AMA StyleMohd. Ahmed, Saeed AlQadhi, Saleh Alsulamy, Saiful Islam, Roohul Khan, Mohd. Danish. Development of Self-Cured Sustainable Concrete Using Local Water-Entrainment Aggregates of Vesicular Basalt. Sustainability. 2021; 13 (12):6756.
Chicago/Turabian StyleMohd. Ahmed; Saeed AlQadhi; Saleh Alsulamy; Saiful Islam; Roohul Khan; Mohd. Danish. 2021. "Development of Self-Cured Sustainable Concrete Using Local Water-Entrainment Aggregates of Vesicular Basalt." Sustainability 13, no. 12: 6756.
The construction sector is garnering increasing concern as an industry that generates significant pollution while suffering from a lack of adequate environmental performance evaluations. The purpose of this study is to evaluate the environmental performance of construction sector industries using the ISO 14031 standard in three dimensions: planning, using data and information, and reviewing and improving environmental performance evaluations. Using a descriptive and correlational approach, this study described and analyzed the level of implementation using a 7-point Likert scale questionnaire distributed to 1000 organizations in Saudi Arabia. The questionnaires were completed between May and December of 2018 and the results were measured against similar studies. The mean positive percentage responses were 31.36 and expressed the implementation levels of the three dimensions of environmental performance. The corresponding values for the three dimensions’ items were 33.36, 29.83, and 30.95 respectively. The minimum Kendall correlation coefficients for each item in a dimension were 0.79, 0.79, and 0.83, respectively. The maximum correlation values between an item and a dimension to which the item did not belong were 0.25. This study answers a fundamental question regarding the implementation level values of environmental performance in construction organizations based on the ISO 14031 standard model and analyzes the pairwise correlation among the descriptor variables of the model. Further studies are needed to investigate the model structure using the principle component, factor analysis, and cluster analysis.
Ibrahim Falqi; Saleh Alsulamy; Mohamed Mansour. Environmental Performance Evaluation and Analysis Using ISO 14031 Guidelines in Construction Sector Industries. Sustainability 2020, 12, 1774 .
AMA StyleIbrahim Falqi, Saleh Alsulamy, Mohamed Mansour. Environmental Performance Evaluation and Analysis Using ISO 14031 Guidelines in Construction Sector Industries. Sustainability. 2020; 12 (5):1774.
Chicago/Turabian StyleIbrahim Falqi; Saleh Alsulamy; Mohamed Mansour. 2020. "Environmental Performance Evaluation and Analysis Using ISO 14031 Guidelines in Construction Sector Industries." Sustainability 12, no. 5: 1774.