A method for improving the durability of Concrete formulations, a method to control the amount of Air in the formulations of Concrete, concrete Composition and structure that includes the formulation of Concrete

摘要

Methods for controlling the durability and / or air quantity in the cement formulation include combining cement, water and optional blends, powder additives and / or additives to form a cement mixture; adding pre expanded particles to the cement mixture to form a cement preparation. The average diameter of the particles before edema is 0.2mm-3mm, the density of the whole block is 0.015g/ml-0.35g/ml, and the dimension is 1:3,And a continuous, smooth shell According to ASTM c666 (2003) procedure a, the curing and curing formula of concrete usually has at least 70% relative dynamic modules. The lethal amount in concrete is generally higher than the amount of air in a similar formula without pre expanded particles, determined in accordance with ASTM C21 as a percentage of pre expanded volume. The concrete formula can be used to make articles. Requirement No. 22: one concrete composition, including 8-20% of cement volume, 11-50% of fine addition,9-40% of the bulk treatment volume, 7-30% of the water volume, 6-40% of the pre expansion particles, which supply w / W from 0.25 to 0.6% of the water to the cement field; the average sector diameter of the pre expansion particles is 0.2 to 3 mm, and the bulk density is 0.015 g / CC a. 0.35g/ml, 1-3-dimensional relationship with continuous and smooth external area; according to procedure a of ASTM c666 (2003), the curing and hardening structure of concrete has at least 70% relative modulation (RDM);Ants that had solidified and solidified there for 28 days had a composition with compressive resistance of at least 1400 psi tested in accordance with ASTM C39.