Waste glass powder as partial replacement of cement for sustainable concrete practice
By G. Islam, M.H. Rahman, Nayem Kazi. 2017
602 citations recorded by the source corpus.
Abstract Million tons of waste glass is being generated annually all over the world. Once the glass becomes a waste it is disposed as landfills, which is unsustainable as this does not decompose in the environment. Glass is principally composed of silica. Use of milled (ground) waste glass in concrete as partial replacement of cement could be an important step toward development of sustainable (environmentally friendly, energy-efficient and economical) infrastructure systems. When waste glass is milled down to micro size particles, it is expected to undergo pozzolanic reactions with cement hydrates, forming secondary Calcium Silicate Hydrate (C–S–H). In this research chemical properties of both clear and colored glass were evaluated. Chemical analysis of glass and cement samples was determined using X-ray fluorescence (XRF) technique and found minor differences in composition between clear and colored glasses. Flow and compressive strength tests on mortar and concrete were carried out by adding 0–25% ground glass in which water to binder (cement + glass) ratio is kept the same for all replacement levels. With increase in glass addition mortar flow was slightly increased while a minor effect on concrete workability was noted. To evaluate the packing and pozzolanic effects, further tests were also conducted with same mix details and 1% super plasticizing admixture dose (by weight of cement) and generally found an increase in compressive strength of mortars with admixture. As with mortar, concrete cube samples were prepared and tested for strength (until 1 year curing). The compressive strength test results indicated that recycled glass mortar and concrete gave better strength compared to control samples. A 20% replacement of cement with waste glass was found convincing considering cost and the environment.
Subfields: Building and Construction, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/31daa67225ec14b4e7991ccf93a95f38a1c6ced3
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Citations in the corpus
- Durability and strength characteristics of high-strength concrete incorporated with volcanic pumice powder and polypropylene fibers (2020, background): “SCMs have been widely investigated as a replacement for Portland cement in industrial waste materials, such as palm oil clinker [19], pyrite cinders [20], rice husk ash [21], waste glass[22,23], zeolite [24,25], and fly ash [26].”
- Green Concrete: By-Products Utilization and Advanced Approaches (2019, methodology): “5–70 μm [22], while the second row used glass powder passing through (#200 sieve) [23], which is 75 μm.”