A process for preparing high-strength modified sulfur concrete by cold-water bath vibrating molding method

Abstract

The invention belongs to the technical field of building materials, and in particular relates to a process for preparing high-strength modified sulfur concrete by a cold-water bath vibrating molding method. The compactness of the sulfur matrix is ​​improved to a large extent, that is, the adverse effects on the strength caused by the holes formed by the cooling and shrinkage of the sulfur matrix are avoided, and the operation is simple and the device is simple to manufacture. The compressive strength is as low as 77MPa, there are very few holes in the test block, the density is high, the strength dispersion between the test blocks is low, and the compressive strength is stable. At the same time, the invention also optimizes the optimal ratio of the sulfur concrete premix before the molding stage, and the compressive strength of the modified sulfur concrete prepared by the optimal concrete ratio combined with the cold-water bath vibrating molding process is averaged. up to 87MPa.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a process for preparing high-strength modified sulfur concrete by a cold-water bath vibrating molding method. Background technique [0002] Sulfur concrete is a new sustainable building material made of sulfur, mineral fillers and aggregates, also known as sulfur concrete. Different from traditional silicate concrete, sulfur is used as a binder, which is neither a hydraulic nor a gas-hardening material. The hardening principle is the cooling and crystallization of sulfur, which is a physical change. Therefore, the hardening process is very fast. It can be hardened and formed after cooling for a few minutes at room temperature, and it can approach the final strength of the matrix after a few hours. It is an excellent early-strength material. [0003] Sulfur concrete has high compressive strength. The compressive strength of modified pure sulfur is as high a...

AI Technical Summary

Problems solved by technology

[0004] Although sulfur concrete has excellent mechanical properties and durability, its preparation process is complicated and has certain risks

The traditional preparation process requires oil bath insulation and stirring, and the modifier has certain toxicity during the preparation process, which will cause harm to the human body. This is also the reason why there are not many researches on this material in China at present.

At the same time, the volume shrinkage that occurs when sulfur is cooled is a relatively serious problem at present. The mechanical properties of the samples prepared by the traditional process are large in dispersion and the matrix has many pores.

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