Phosphogypsum-base foaming concrete

Abstract

The invention relates to a construction material, especially a phosphogypsum-base foaming concrete. The concrete is composed of the following components in parts by weight: 60 to 350 parts of water, 43.5 to 261 parts of phosphogypsum, 10 to 60 parts of fly ash, 10 to 60 parts of cement, 3 to 3.5 parts of quicklime, 0.01 to 0.02 part of water reducer, and 0.5 to 3.5 parts of foaming agent; wherein the particle size of fly ash is in a range of 5 [mu]m to 25 [mu]m, the cement is 325 slag cement, the water reducer is a naphthalene water reducer, and the foaming agent is a polymer concrete foaming agent. The weight of the concrete prepared according to the formula mentioned above is reduced by 30%, compared to that of the common solid non-foaming concrete. The 28-day compression resistant strength of the cement is in a range of 3.8 to 4.3 MPa. Moreover, the phosphogypsum and 325 slag cement are both industrial solid wastes, so the manufacturing cost of the cement is very low.

Description

technical field [0001] The invention relates to a building material, in particular to a phosphogypsum-based foamed concrete. Background technique [0002] Ordinary concrete is mainly composed of fly ash, cement, quicklime and water. Cement generally accounts for 40%-80% of its total weight. Since the price of cement is relatively expensive, the cost of concrete produced with this formula is not high. Cheap. It can be seen that research on relatively cheap concrete formulations is of great market value. [0003] Phosphogypsum is the most important industrial solid waste in the production of phosphorus chemical industry, and its main component is dihydrate gypsum (CaSO 4 2H 2 O), the content is generally as high as more than 90%, and usually also contains a certain amount of P 2 o 5 (0.3%-1.5%) impurity. In recent years, with the increase in the development intensity of phosphate rock resources, the discharge of phosphogypsum, which is a solid waste after processing and ...

AI Technical Summary

Problems solved by technology

In recent years, with the increase in the development intensity of phosphate rock resources, the discharge of phosphogypsum, which is a solid waste after processing and utilization of phosphate rock, has also increased rapidly. Except for about 10% of comprehensive utilization, most of them are piled up in warehouses , this move not only requires large investment and high maintenance costs, but also takes up a lot of valuable land resources