Towards green concrete: Study the role of waste glass powder on cement/superplasticizer compatibility
| Autor: | Saber Ibrahim, Amr Meawad |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Cement
Materials science Superplasticizer Building and Construction law.invention Portland cement chemistry.chemical_compound Adsorption Sulfonate Chemical engineering chemistry Mechanics of Materials law Architecture Compatibility (mechanics) Zeta potential Cementitious Safety Risk Reliability and Quality Civil and Structural Engineering |
| Zdroj: | Journal of Building Engineering. 47:103751 |
| ISSN: | 2352-7102 |
| DOI: | 10.1016/j.jobe.2021.103751 |
| Popis: | This paper aims to study the influence of a supplementary cementitious material, waste glass powder (WGP), on the compatibility of polynaphthalene sulfonate (PNS) based or polycarboxylate (PC) based superplasticizers and ordinary Portland cement (OPC). Different blended cement mixtures are prepared and their standard water consistency and setting time is evaluated. The effect of waste glass powder content in the blended cement on the compatibility is studied through mini-slump test, zeta potential measurements and the mass of superplasticizers adsorbed on the surface of binder particles using total organic carbon (TOC) measurements. The results revealed that the presence of WGP has a great effect on the flowability and flowability retention time when PNS or PC were used as a superplasticizer. The adsorption behaviour of both superplasticizers was altered where the amount of PNS adsorbed on the cement particles increased while that of PC decreased by increasing the percentage of incorporated WGP. The absolute zeta potential is significantly increased (in negative value) with the addition of PNS, but approximately not changed with the addition of PC. The change in adsorption behaviour and the zeta potential measurement explained the compatibility of both superplasticizers with blended cement. |
| Databáze: | OpenAIRE |
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