Limestone accelerator

Abstract

The invention discloses a limestone accelerator which is prepared from the following raw materials in parts by weight: 20-24 parts of bauxite, 7-11 parts of limestone, 12-16 parts of sodium carbonate,4-8 parts of non-ionic linear high-molecular polymer and 6-10 parts of aluminum oxide. According to the scheme, by adding the nonionic linear high-molecular polymer, the aluminum oxide, silicon dioxide, an additive, latex powder, a composite flowing agent, silica fume, calcium oxide, polyamide wax, microcrystalline cellulose, an air entraining agent, cellulose ether, an ionic group, graphene oxide and a carbon nano tube, the strength required by the concrete in the early stage can be ensured; the later strength of the concrete can be guaranteed, the loss of collapse degree is reduced, the sizes of crystals in a transition region of coarse particles and an accelerator in the concrete can be effectively improved, the compactness of the crystals in the transition region is increased, the porosity is reduced, the number of microcracks in the transition region is reduced, the overall strength of the concrete is improved, and the coarse particles and the accelerator can be mixed more uniformly.

Description

technical field [0001] The invention relates to the technical field of building auxiliary materials, in particular to a limestone quick-setting agent. Background technique [0002] Accelerator: an admixture that can be mixed into concrete to make concrete harden quickly. The main types are inorganic salts, organic substances, and powdery solids. Concrete initially sets within 5 minutes, and the accelerator sets within 12 minutes to achieve the purpose of rapid repair or rapid setting of concrete in shafts. It is an indispensable additive in the shotcrete construction method. Their function is to accelerate the hydration and hardening of cement. It can form enough strength in a short period of time to meet the requirements of special construction. [0003] Because the limestone quick-setting agent is added when the material is stirred, because the stones and sand contain a large amount of water, the quick-setting agent absorbs water in a short period of time and decomposes i...

AI Technical Summary

Problems solved by technology

[0003] Because the limestone quick-setting agent is added when the material is stirred, because the stones and sand contain a large amount of water, the quick-setting agent absorbs water in a short period of time and decomposes its quick-setting components when it is not sprayed, which affects the setting time and reduces the strength of the concrete, which will lead to sprayed concrete. The adverse effects of the quick-setting agent and concrete lead to a short mixing time, which will easily affect the uniformity of the distribution of the quick-setting agent in the concrete, and there will be agglomeration of the accelerator in the concrete, which will affect the concrete. In the later period of bending resistance and strength, therefore, at this stage, a new type of limestone accelerator is urgently needed to solve the above problems

Images