Self-maintenance concrete

Abstract

The invention relates to self-maintenance concrete. High-performance moisture retention powder is added to mixed concrete, the amount of the moisture retention powder is 0.5-5wt% of cement in the concrete, and the moisture retention powder which can absorb a water steam in air and release water to the concrete enables the self-maintenance efficacy of the concrete to be reached without extra water or any external maintenance after watering the concrete. The self-maintenance concrete can avoid the excess evapotranspiration of water on the surface of the concrete, and can solve known problems of incomplete cement hydration and concrete requirement unsatisfying caused by failure concrete maintenance. The self-maintenance concrete allows the high-performance moisture retention powder to be added to the mixed concrete, and the moisture retention powder which can absorb the water steam in the air and release water to the concrete enables the self-maintenance efficacy of the concrete to be reached without extra water or any external maintenance after watering the concrete; and compared with self-filling concrete subjected to wet maintenance, the self-maintenance concrete of the invention has the advantages of no need of long-time manpower wet maintenance, manpower cost saving, and good compressive strength.

Description

[0001] This application is a divisional application of the invention patent application named "self-curing concrete" filed on May 23, 2006 with application number 200610080647.5. technical field [0002] The invention relates to a kind of concrete, in particular to a kind of high-performance moisturizing powder added to the mixed concrete, which can achieve self-curing effect without long-term artificial wet curing and maintenance, and can save labor costs and have better compressive strength Self-curing concrete with water absorption and moisturizing effect. Background technique [0003] When concrete is condensed and hardened under natural climate conditions, if no maintenance measures are taken, the concrete will lose a large amount of water in the early stage due to the rapid evaporation of water, which will affect the progress of cement hydration reaction, resulting in peeling, sanding or cracking on the concrete surface. Shrinkage cracks and other phenomena will occur,...

AI Technical Summary

Problems solved by technology

However, the wet treatment method requires regular maintenance such as periodic watering, spraying or spraying, and the repeated action of wetting and drying will cause cracks inside the structure and cause the structure to lose its integrity

[0004] In addition, the known curing methods for general concrete currently also include protective film curing method and impermeable material covering curing method; and the protective film curing method is to spray a layer of liquid film curing agent (also known as Thin film curing liquid), the curing agent can quickly form a layer of impermeable sealing film on the surface of the concrete, preventing the water in the concrete from evaporating, and making the cement in the concrete fully hydrated. The viscosity of the agent is low, and it is easy to accumulate in the depressions on the concrete surface. The film will reduce the surface friction coefficient and the effect is not good; the impermeable covering curing method is only suitable for large-area structures with simple shapes

Although there are regulations on "proper maintenance" in domestic and foreign codes, relevant research shows that in actual construction, even the most basic maintenance requirements are sometimes ignored and difficult to achieve, or even not maintained at all

[0005] This shows that above-mentioned existing concrete obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

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