Using glass powder to manufacture eco-friendly self-consolidating concrete (SCC) has been develop... more Using glass powder to manufacture eco-friendly self-consolidating concrete (SCC) has been developed and improved in recent years. While researchers have determined the effect of glass powder on rheological properties of the green concretes, the sensitivity of SCC to this powder content yet remains to be investigated. This study introduced the concepts of insensitive design, and subsequently, the ranges of water to powder ratio, sodium lignosulfonate plasticizer (LS), and glass powder were determined and optimized by the artificial neural network and particle swarm optimization, respectively. The results showed the possibility of producing SCC with the least possible sensitivity to water, glass powder, and plasticizer variations. The best water to cement ratio to design an insensitive SCC derived between 0.33 and 0.34, but the reduction in the compressive strength was inevitable for the augmented water-to-cement ratio. The effect of glass powder on alkali-silica reactions (ASR) and compressive strength was also investigated to clear the way for the incorporation of glass powder in SCC. The results indicated that the ASR reduced to 52% by substituting 30% glass powder.
The durability of environment-friendly concrete containing two types of waste material is investi... more The durability of environment-friendly concrete containing two types of waste material is investigated. Glass powder and microsilica with high silica content were selected to compare their effects on the durability of self-consolidating concrete (SCC) and ordinary concrete with the same packing density in the acidic medium. Experimental results show that microsilica and glass powder do not contribute to concrete corrosion reduction and the most important variable would be superplasticizer content. According to this result, ordinary concretes with lower superplasticizer content show better performance in HCl medium than SCCs. For a quantitative analysis and even to elicit the optimum values for minimum corrosion from the experimental results, an artificial neural network (ANN) and particle swarm optimization (PSO) were used. The minimum mass-loss was related to 15.68 % for the volume of permeable pores and the optimum value for compressive strength would be in the range of 32 to 34 MPa.
Combination of microsilica and nanosilica (colloidal silica) are considered to design a high stre... more Combination of microsilica and nanosilica (colloidal silica) are considered to design a high strength self-consolidating concrete to resist in the sulfuric acid medium. Artificial intelligence was used to predict and compare the behavior of these two pozzolans in a sulfuric acid medium. Contour plots were used to investigate the products combination better. Thermogravimetric analysis (TGA) was also used to find the calcium hydroxide range while using these two pozzolans. TGA revealed that colloidal silica did not contribute to cement hydration within seven days of curing while a combination of them boosted calcium hydroxide consumption. The results show that more substitution of the pozzolans could lead to lower mass loss while nanosilica has marginal effect on the residual compressive strength. The results also revealed that 7 percent substitution of microsilica showed the same effect as 2 percent nanosilica replacement.
Sewage system collapse is a widespread problem due to induced sulfuric acid corrosion by sulfur-o... more Sewage system collapse is a widespread problem due to induced sulfuric acid corrosion by sulfur-oxidizing bacteria. Numerous studies tried to enhance concrete performance which led to contradictory results; this matter signifies on dissimilar laboratory conditions and results analysis methods. Glass is known as one of the most resistant materials against sulfuric acid (H2SO4) attack; it can be assumed that concretes containing glass powder have acidic resistance as well. The high silica content in both glass powder and microsilica clear the way for comparing their effects on the durability of self-consolidating and ordinary concretes with the same packing density in the H2SO4 medium. Different concrete relationships were elicited among concrete characteristics by performing statistical analyses. Artificial neural networks (ANN) was employed to predict the mass-loss and volume-loss in the specimens. It was found that both the substitutional materials used were capable of enhancing sewer durability.
Using glass powder to manufacture eco-friendly self-consolidating concrete (SCC) has been develop... more Using glass powder to manufacture eco-friendly self-consolidating concrete (SCC) has been developed and improved in recent years. While researchers have determined the effect of glass powder on rheological properties of the green concretes, the sensitivity of SCC to this powder content yet remains to be investigated. This study introduced the concepts of insensitive design, and subsequently, the ranges of water to powder ratio, sodium lignosulfonate plasticizer (LS), and glass powder were determined and optimized by the artificial neural network and particle swarm optimization, respectively. The results showed the possibility of producing SCC with the least possible sensitivity to water, glass powder, and plasticizer variations. The best water to cement ratio to design an insensitive SCC derived between 0.33 and 0.34, but the reduction in the compressive strength was inevitable for the augmented water-to-cement ratio. The effect of glass powder on alkali-silica reactions (ASR) and compressive strength was also investigated to clear the way for the incorporation of glass powder in SCC. The results indicated that the ASR reduced to 52% by substituting 30% glass powder.
The durability of environment-friendly concrete containing two types of waste material is investi... more The durability of environment-friendly concrete containing two types of waste material is investigated. Glass powder and microsilica with high silica content were selected to compare their effects on the durability of self-consolidating concrete (SCC) and ordinary concrete with the same packing density in the acidic medium. Experimental results show that microsilica and glass powder do not contribute to concrete corrosion reduction and the most important variable would be superplasticizer content. According to this result, ordinary concretes with lower superplasticizer content show better performance in HCl medium than SCCs. For a quantitative analysis and even to elicit the optimum values for minimum corrosion from the experimental results, an artificial neural network (ANN) and particle swarm optimization (PSO) were used. The minimum mass-loss was related to 15.68 % for the volume of permeable pores and the optimum value for compressive strength would be in the range of 32 to 34 MPa.
Combination of microsilica and nanosilica (colloidal silica) are considered to design a high stre... more Combination of microsilica and nanosilica (colloidal silica) are considered to design a high strength self-consolidating concrete to resist in the sulfuric acid medium. Artificial intelligence was used to predict and compare the behavior of these two pozzolans in a sulfuric acid medium. Contour plots were used to investigate the products combination better. Thermogravimetric analysis (TGA) was also used to find the calcium hydroxide range while using these two pozzolans. TGA revealed that colloidal silica did not contribute to cement hydration within seven days of curing while a combination of them boosted calcium hydroxide consumption. The results show that more substitution of the pozzolans could lead to lower mass loss while nanosilica has marginal effect on the residual compressive strength. The results also revealed that 7 percent substitution of microsilica showed the same effect as 2 percent nanosilica replacement.
Sewage system collapse is a widespread problem due to induced sulfuric acid corrosion by sulfur-o... more Sewage system collapse is a widespread problem due to induced sulfuric acid corrosion by sulfur-oxidizing bacteria. Numerous studies tried to enhance concrete performance which led to contradictory results; this matter signifies on dissimilar laboratory conditions and results analysis methods. Glass is known as one of the most resistant materials against sulfuric acid (H2SO4) attack; it can be assumed that concretes containing glass powder have acidic resistance as well. The high silica content in both glass powder and microsilica clear the way for comparing their effects on the durability of self-consolidating and ordinary concretes with the same packing density in the H2SO4 medium. Different concrete relationships were elicited among concrete characteristics by performing statistical analyses. Artificial neural networks (ANN) was employed to predict the mass-loss and volume-loss in the specimens. It was found that both the substitutional materials used were capable of enhancing sewer durability.
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