Ready-mixed concrete with phosphorus slag powder

Abstract

The invention relates to a ready-mixed concrete with phosphorus slag powder, which is characterized in that the composition ratio and the weight ratio comprise the following parts: 120-150 parts of cement, 100-250 parts of phosphorus slag powder, 0-120 part(s) of fly ash, 0.5-20 part(s) of water reducing agent, 0-0.5 part of air entraining agent, 0-0.02 part of water retention agent, 50-17000 parts of coarse aggregate, 20-9000 parts of fine aggregate and 100-300 parts of water. The invention takes the industrial waste residue i.e. the phosphorus slag powder as the admixture part of the concrete to replace the cement to dope in the ready-mixed concrete, thereby reducing the use amount of the cement, uses the retarding characteristic of the phosphorus slag to reduce the gelled material cost of the concrete and the manufacture cost the of concrete pumping aid, simultaneously gives full play to the characteristic of the phosphorus slag so as to reduce the hydration heat and the adiabatic temperature rise of the concrete, decreases the elasticity modulus and improves the ultimate tensile strain capacity of the concrete, the strength growth rate is high, and the durability is significantly improved; and the invention can changes the waste into the valuable and turns the harmful into the beneficial.

Description

technical field [0001] The invention belongs to concrete using part of waste materials as concrete admixture, and relates to a ready-mixed concrete with phosphorous slag powder. Background technique [0002] Phosphorus slag is a kind of industrial waste produced in the process of producing yellow phosphorus by electric furnace. When yellow phosphorus is produced by electric furnace method, the obtained melt with calcium silicate as the main component is granulated electric furnace phosphorus after quenching. Slag, referred to as phosphorus slag, produces about 8-10 tons of phosphorus slag for every 1 ton of yellow phosphorus produced. The chemical composition of phosphorus slag is mainly composed of SiO 2 and CaO, other components in phosphorus slag depend on the quality and production process of the phosphate rock used, usually containing Al 2 o 3 The amount is 2.5%-5% (weight%, the same below), Fe 2 o 3 0.2%-2.5%, MgO 0.5%-5%, P 2 o 5 1%-5%, F 0-2.5%. The quenched ...

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Problems solved by technology

[0003] In the prior art, the utilization of phosphorus slag is less, and the discharge of a large amount of phosphorus slag not only occupies a large amount of land, but also pollutes the environment, and harmful components such as phosphorus in phosphorus slag will seep into the ground under the shower of rainwater, Cause soil and groundwater pollution, endanger human health