Research on Performance of Concrete Made with Mineral Fillers and Fly Ash Admixed Desulphurization Gypsum

Abstract:

In order to improve the performance of concrete, reasonably use industrial waste and realize the sustainable development target of economy and environment, mineral admixtures have been widely used in concrete. But, widely using mineral admixtures reduces the overall performance of concrete, the reason is that the mineral admixtures dilutes the SO₃ content in cementitious material, restricts generating the hydrates in the later concrete. If also add industrial by-products desulphurization gypsum in concrete, the added desulphurization gypsum as admixture not only improves the SO₃ content in concrete, but also prime and crystal sulfate active, promote other admixtures pozzolanic effect, configuration effect and micro-aggregated effect. Experiments show that, when the desulphurization gypsum that added into cementitious material content is following 10%, in other words the desulphurization gypsum content is 3.1%, it can improve the mechanical performance of the concrete. Considering the early strength and work performance of cement, the desulphurization gypsum content that added into cementitious material should be controlled in the range of 8%, early strength increases by 16.9% and late strength also increases.

• Periodical: Applied Mechanics and Materials (Volumes 584-586)
• Pages: 934-938
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.584-586.934
• Online since: July 2014
• Authors: Li Sun*, Hou Tian Zhang, Da Xing Qian
• Keywords: Admixture, Concrete, Desulphurization Gypsum, Performance of Concrete

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