article · Key engineering materials
High-strength self-compacting concrete combines ease of placement with high mechanical strength, but typically demands elevated cement content that drives up production costs. Incorporating recycled glass powder offers a way to reduce cement consumption while diverting glass waste from disposal streams. Experimental testing examined eleven concrete mixtures using bottle glass powder and window glass powder to replace cement at levels between 10 and 50 percent by weight. Assessments evaluated workability, compressive strength, and durability measures including chloride permeability, water permeability, and sorptivity. The inclusion of glass powder improved the workability of fresh concrete, satisfying standard European specifications. Although higher glass replacement levels reduced compressive strength, the transport properties of the concrete improved significantly. Both water and chloride permeability declined relative to standard mixes, indicating enhanced resistance to fluid penetration.
Standard cement production is costly and resource-intensive. Substituting recycled glass waste into specialised concrete reduces cement demand and provides an outlet for discarded glass. Even though compressive strength drops at higher substitution levels, the improved resistance to water and chloride penetration can protect concrete against moisture-related deterioration, supporting more sustainable building practices.
The findings could inform concrete manufacturers and construction contractors seeking lower-cost, sustainable materials with enhanced resistance to moisture and chloride ingress. However, because higher replacement levels reduce compressive strength, practical applications may be limited to specific structural performance classes. The research remains at an early, laboratory-tested stage, having evaluated eleven mix designs against workability and durability metrics without addressing full-scale production or structural field trials.
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High-strength self-compacting concrete (HSSCC) is a special concrete that mixes self-compacting and high-strength properties. The production of HSSCC may require a high cement content, which increases the cost and limits production. This research focuses on producing HSSCC using glass powder (GP) to reduce the cement content and absorb glass waste. In this research, the experimental study was conducted on the degree of eleven experimental mixtures for SCC samples. Two types of glass waste powder (bottle glass powder and window glass powder) were added as a partial substitute for cement in proportions 10-50% by weight of cement. To evaluate the performance of GP, tests on workability, compressive strength, and transport characteristics (Chloride Permeability, Sorptivity Coefficient, and Water Permeability) were performed. The results showed that adding GP to concrete improved its fresh properties, which met the requirements of EFNARC specifications. The results also showed that adding GP decreased compressive strength with an increase in replacement rates. On the other hand, the transport properties improved, and the water and chloride permeability decreased with GP compared to the reference mixture. Keywords : High-strength self-compacting concrete, bottle glass powder, window glass powder, fresh properties, compressive strength, transport properties
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DOI: 10.4028/p-w4tcjx
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