Marine durable cement concrete

Abstract

The invention relates to a durable marine cement concrete. The invention is formed by stirring water, cementing material, aggregate, water reducer and admixture. The admixture comprises more than one of rosin and paraffin as well as rusty retardant agent and rosin pyrolytic polymer, wherein the mixing amount of the rosin, the paraffin or the mixtures of the rosin and the paraffin is 2 to 8 percent, of the rusty retardant agent is 1 to 5 percent, and of the rosin pyrolystic polymer is 0.01 to 0.04 percent, based on the gross weight of the cementing material. The cementing material comprises the cement and additive, wherein the additive includes mineral powder and fly ash. The mixing amount of the cement is 25 to 35 percent, of the mineral powder is 45 to 55 percent, and of the fly ash is 15 to 20 percent, based on the gross weight of the cementing material. The mixing amount of the water reducer is 0.80 to 0.99 percent based on the gross weight of the cementing material while of the aggregate is 74 to 76.4 percent. The ratio of the mixing amount of water to the cementing material is 0.30 to 0.40. The invention fundamentally improves the durability of the marine cement concrete, more particularly, the high resistance to corrosion of the alkali-aggregate reaction and Chloride ion erosion.

Description

(1) Technical field [0001] The invention relates to a marine cement concrete, in particular to a durable marine cement concrete. (2) Background technology [0002] Ordinary concrete is mainly prepared according to the cubic compressive strength, gravel acts as a skeleton, sand fills the voids of the gravel, and cement paste fills the voids of the aggregate and binds the aggregate together. However, ordinary concrete does not fully consider the degradation of the performance of concrete structural materials by the atmosphere, soil and water that the structure is in contact with, especially the erosion of chloride ions in seawater on concrete structures. [0003] Concrete is currently the main structural material in the field of construction, and its durability is no less important than its strength and other properties. Many concrete buildings are cracked, damaged, or even collapsed due to material deterioration. This situation is especially common in harbor projects and bri...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a corrosion-resistant and high-strength marine cement concrete for the defect that the concrete void ratio is relatively large and there are tubular voids.