Pumice straw lightweight aggregate concrete and preparation method thereof

Abstract

Pumice straw lightweight aggregate concrete and a preparation method thereof. The raw materials of the pumice straw lightweight aggregate concrete comprise, by weight, 1 part of cement, 0.40-0.50 part of fly ash, 2.05-2.55 parts of pumice sand, 0.03-0.05 part of corn straw fibers, 0.010-0.015 part of an additive, 0.005-0.007 part of a foaming agent, and 0.50-0.55 part of water. The preparation method provided by the invention comprises: Step 1, preparing thin shell pumice sand and thin shell straw fibers; Step 2, pouring the cement, fly ash, water and additive according to the ratio as well as the prepared thin shell pumice sand into a mixer with uniformly stirring; Step 3, pouring the thin shell straw fibers into the mixer with further stirring; Step 4, whisking the foaming agent, pouring the foaming agent into the above stirred substances, followed by stirring to produce the pumice straw lightweight aggregate concrete. According to the invention, the mechanical properties of the lightweight aggregate concrete are effectively raised, the heat insulation performance is enhanced, and the production cost is reduced.

Description

technical field [0001] The invention relates to a lightweight aggregate concrete and a preparation method thereof. Background technique [0002] Light aggregate concrete is light concrete made of light aggregate with a bulk density not greater than 1900 kg / m, also known as porous aggregate light concrete. Because light aggregate concrete contains a large number of closed pores, it has light weight, good thermal insulation performance, and convenient construction. Compared with ordinary concrete of the same grade, it can reduce its own weight by more than 20-30%. Existing lightweight aggregate concrete is usually prepared into foam by mechanical means, and then the foam is added to the slurry composed of siliceous materials, calcium materials, water and various admixtures, etc. After mixing, stirring, It is formed by pouring and curing. At present, ceramsite, slag, pumice, expanded perlite, polystyrene foam plastic particles, etc. are mainly used as light raw materials. Th...

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Problems solved by technology

[0005] The present invention provides a kind of pumice straw lightweight aggregate concrete and its preparation method, to solve the problems of high raw material cost and high production energy consumption of existing lightweight aggregate concrete; and to solve the problem of poor workability between light raw materials and concrete, resulting in a large amount of cement slurry It is sucked into the hole during mixing, the density of lightweight aggregate concrete is high, the thermal conductivity is high, and the technical problem of thermal insulation effect is not good; it also solves the technical problems that the preparation method of ordinary lightweight aggregate concrete is easy to delaminate inside the concrete when mixing, which affects Technical issues with product performance

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