Granulated sugar retarded cement and production method and application of granulated sugar in retarded cement

Abstract

The present invention is granulated sugar retarded cement and its production process and the application of granulated sugar in retarded cement. The granulated sugar retarded cement contains Portland cement clinker, gypsum and admixture, including granulated sugar in 0.004-0.08 wt%. During its production process, the Portland cement clinker has 80 micron screen residue controlled in not more than 3.0 %, and sulfur trioxide content is controlled in 2.1-2.7 %. Granulated sugar has obvious setting delaying effect and grinding assisting effect, and is suitable for different kinds of cement.

Description

technical field [0001] The invention relates to the technical field of cement, and relates to a sugar retarded cement, a production method thereof and the application of sugar in retarded cement. Background technique [0002] With the development of expressways and mass concrete engineering construction, a large amount of cement with an initial setting time of 4 hours to 6 hours and a final setting time of 6 hours to 10 hours is required, and some setting times need to be longer. This is the general adjustment of ingredients The goal that is difficult to achieve with the program and conventional retarder, so it can only be solved by adding retarder technology. The development of cement retarders has a history of about 100 years. Calcium chloride, gypsum, calcium oxide, etc. were first used as cement retarders. Cement retarders can be divided into inorganic retarders and organic retarders. At present, phosphogypsum is commonly used as retarder. Using phosphogypsum as retarde...

AI Technical Summary

Problems solved by technology

Cement retarders can be divided into inorganic retarders and organic retarders. At present, phosphogypsum is commonly used as retarder. Using phosphogypsum as retarder to produce retarded cement has the following problems: First, the price of phosphogypsum is high , the mixing amount is large, the cost of producing retarder cement is high, and the economic benefit is reduced; the second is that a part of acid remains in the phosphogypsum, so that the compressive strength of the retarder cement is significantly reduced in 3 days and 28 days; the third is the water content of phosphogypsum Large, high viscosity, which affects the production capacity of the mill, and the production is carried out on the 2.4m×7m mill, which is 1 ton / hour lower than other cement production units on average. Plaster work is heavy