Self-compacted concrete of resisting erosion of sulfate and its preparing method

Abstract

The invention relates to a sulfate corrosion-resistant self-compacted concrete and the preparing method, adopting fly ash, slag and siliceous dust and cement as concrete cementitous material and adding in water reducer and thickening agent to prepare a high-fluidity self-compacted concrete. And the components in the concrete which are corroded by sulfate are remarkably reduced so as to reduce possibility of corrosion to the concrete. And the concrete has high fluidity, slump above 25 cm, extensibility above 60 cm, and blocking ratio above 0.8; and the corrosion test of above 9 months with 10% sodium sulfate solution shows that compressive ratio is above 0.8 and the surface is complete. And the preparing method is simple, and has low cost and wide application.

Description

technical field

[0001] The invention belongs to the technical field of materials, and in particular relates to a sulfate-resistant self-compacting concrete and a preparation method thereof. Background technique

[0002] In recent years, the relevant departments of our country have carried out multi-faceted research on the anti-corrosion technology of structures in saline soil areas, put forward some engineering treatment methods, and achieved certain results. The following are several technologies currently used in sulfate-resistant concrete: First, the application of sulfate-resistant cement. Compared with ordinary silicon cement, the composition of sulfate-resistant cement reduces tricalcium aluminate (C 3 A) content, so the possibility of concrete erosion is reduced; the second is the application of mineral admixtures. Application of mineral admixtures to reduce C in cement hydration products in concrete 3 The content of A, at the same time, exerts the pozzolanic effect...