A heat-resistant concrete made of full-heavy slag aggregates using ordinary Portland cement

Abstract

The present invention relates to a fire-resistant material, particularly to a full-weight slag aggregate heat-resistant concrete prepared by using ordinary silicate cement. The full-weight slag aggregate heat-resistant concrete comprises, by weight, 40-80% of a blast furnace heavy slag aggregate, 10-20% of ordinary silicate cement, 10-20% of slag micro-powder, 0-10% of fly ash, and 0-10% of silica micro-powder, wherein 0.01-0.03% of sodium tripolyphosphate and 0.01-0.03% of sodium metaphosphate are added to the raw materials. According to the present invention, the metallurgical solid waste blast furnace heavy slag is adopted to replace the fire-resistant material to prepare the fire-resistant aggregate, the cementitious material adopts the metallurgical solid waste materials such as the slag powder and the fly ash, and the binding agent uses the ordinary silicate cement with no high temperature resistance, such that the existing metallurgical slag resources are completely utilized to form the silicate and aluminate high temperature resistance hydrate during the cement hydration process so as to reduce the generation of the hydroxide unstable substance, enrich the source of the heat-resistant concrete raw materials, and reduce the cost of the heat-resistant concrete.

Description

technical field

[0001] The invention relates to a refractory material, in particular to a heat-resistant concrete prepared by using ordinary Portland cement to prepare full-weight slag aggregates. Background technique

[0002] Generally, the composition materials of heat-resistant concrete include refractory aggregate (coarse aggregate and fine aggregate), refractory powder, admixture, binder, etc. Among them, the main refractory raw material aggregate is generally a refractory raw material with stable performance. The heat resistance can reach more than 1200°C. It is used to produce heat-resistant concrete below 700°C. It not only wastes the original resources of refractory materials, but also leads to overkill. According to the traditional process, refractory materials are used to make the coarse and fine aggregates of heat-resistant concrete, and then high-temperature-resistant cement-high-alumina cement and water are used to mix in a quantitative manner. Both are higher...