Concrete accelerator

Abstract

The invention discloses a concrete accelerator comprising the following components in parts by weight: 12-14 parts of naphthalene sulfonated formaldehyde condensates, 3-5 parts of efficient water reducing agent, 6-8 parts of calcium formate, 3-8 parts of sodium fluoride, 25-30 parts of cellulose, 16-20 parts of sodium metaaluminate, 8-12 parts of aluminum sulfate, 3-6 parts of aluminite, 4-8 parts of gas mud and 2-6 parts of silicon powder. The concrete accelerator has the beneficial effects that 1, the setting time is short: the initial setting lasts for 1-5min, the final setting lasts for 5-10min, and the optimal proportion is 3-5% of the dosage of a cementing material; 2, the concrete accelerator contains 1% of alkaline metal and lt and is nontoxic, tasteless and nonirritant; 3, the fineness is up to 80mum, and the content of screen tailings is less than 10%; 4, the early strength of the sprayed concrete is high, and the compressive strength preserving rate of the sprayed concrete with the age of 28 days is up to 80-100%; and 5, the concrete accelerator is good in cohesiveness for a sprayed material, antirust for reinforcing steel bars, capable of increasing the anti-permeability grade, rapid in setting, thick in one-step spray layer and capable of achieving a 130-mm sprayed arch and an over 200-mm sprayed wall.

Description

Technical field [0001] The invention involves a concrete agent. Background technique [0002] Schurbone is an outer agent that is mixed with concrete that can quickly condense concrete.The existing concrete speed coagulation is made of aluminum oxygen clinics through the grinding. Its condensate time is long, and the toxicity is high, and the production operation is high. Invention content [0003] The purpose of the present invention is to provide a short -condensation and high -strength concrete agent with shortcomings and high strength in the above existing technologies. [0004] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: a concrete speed coagulation, which consists of the following components of the following compounds: 12-14 copies of the formaldehyde compounds, 3-5 parts of high-efficiency water reducing agent 3-5 copies, 6-8 parts of calcium methalotate, 3-8 sodium fluoride, 25-30 parts of cellulose, 16-20...

AI Technical Summary

Problems solved by technology

The existing concrete quick-setting agents are mostly made of alumina clinker after grinding, which has a long setting time and high toxicity, and has high requirements for production operations