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Curing Cements, Concrete, And Artificial Stone
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Abstract
The concrete is applicable for production of steel-concrete elements and for concrete work with all systems in the construction industry. It has improved consistency of the concrete mixture, better treatability, uniformity, and plasticity, higher strength characteristics in the early and late hardening stages and uses a small quantity of chemical additive. The concrete contains coarse and fine additives, portland cement, chemical additive, and water. The specific mass of the coarse additive is from 2,300 to 2,800 kg/m<3> and the specific mass of the fine additive is from 2,200 to 2,700 kg/m<3>. The mass ratio between the coarse and the fine additives is from 0.54 to 1.06 and the mass ratio between the chemical additive and the portland cement is from 0.0035 to 0.0075. The chemical additive is sulfonated acet-formaldehyde resin with a hydrogen exponent of 10-12 and content of chlorine ions of 0.01-0.3 per cent.