High-density concrete doped with metal aggregate and preparation method of high-density concrete

Abstract

The invention discloses high-density concrete doped with metal aggregate. The high-density concrete comprises the following raw materials, in parts by weight: 300-450 parts by weight of steel slag, 100-140 parts by weight of broken coal gangue, 120-140 parts by weight of fly ash, 200-300 parts by weight of cement (625 or 625R Portland cement), 50-85 parts by weight of fine aggregate, 24-29 parts by weight of coarse aggregate, 20-25 parts by weight of boron glass sand, 10-20 parts by weight of S105 mineral slag powder, 0.5-1 part by weight of an admixture, 200-250 parts by weight of water, 280-350 parts by weight of yellow sand, 5-12 parts by weight of nickel slag, 2-10 parts by weight of a foaming agent, 55-60 parts by weight of sodium metasilicate, 38-43 parts by weight of slaked lime, 15-25 parts by weight of manganese sulfate, and 30-45 parts by weight of broken recycled diatomaceous earth. The invention also discloses a preparation method of the high-density concrete. The high-density concrete doped with the metal aggregate provided by the invention has greatly-improved durability and workability, and the method achieves the effects of saving energy, reducing emission and reducing costs.

Description

technical field [0001] The invention relates to a high-density concrete, in particular to a high-density concrete and a preparation method thereof. Background technique [0002] Steel slag is a by-product of the steelmaking process. Today's production capacity is very spectacular, including a huge amount of coal slag produced in the steelmaking process, but its utilization rate is only 10%. Most of the steel slag is still discarded, which not only occupies farmland, but also pollutes Environment, the main way out for large-scale resource utilization of steel slag is as cement raw material and concrete aggregate. The main reason for the low utilization rate of steel slag is that the stability of steel slag is not good, which affects its normal use in engineering construction and affects the stability of steel slag. There are many factors, mainly because in the process of steelmaking, in order to remove impurities, high-calcium and high-magnesium materials are often added as s...

AI Technical Summary

Problems solved by technology

[0002] Steel slag is a by-product of the steelmaking process. Today's production capacity is very spectacular, including a huge amount of coal slag produced in the steelmaking process, but its utilization rate is only 10%. Most of the steel slag is still discarded, which not only occupies farmland, but also pollutes Environment, the main way out for large-scale resource utilization of steel slag is as cement raw material and concrete aggregate. The main reason for the low utilization rate of steel slag is that the stability of steel slag is not good, which affects its normal use in engineering construction and affects the stability of steel slag. There are many factors, mainly because in the process of steelmaking, in order to remove impurities, high-calcium and high-magnesium materials are often added as slagging agents. Therefore, as the smelting time shortens, the calcium oxide and magnesium oxide in steel slag cannot fully react with silicon dioxide and other components, forming free calcium oxide and free magnesium oxide, which exist in steel slag and are used as building materials or engineering materials. Water will cause volume expansion during use. With the enhancement of environmental awareness in China and the establishment of the concept of circular economy, Chinese scholars and technicians continue to try to use secondary resources such as phosphorus slag, steel slag, and fly ash as the admixture of RCC It relies on the interlocking effect between metal coarse aggregates to obtain strength, less water consumption, low consistency, can save a lot of cement, and has fast construction speed and short maintenance time. It is mainly used in road pavement engineering and hydraulic dam engineering Wait