Anti-crack concrete and preparation method thereof

Abstract

The invention discloses anti-crack concrete and a preparation method thereof. The anti-crack concrete is prepared from the following components in parts by mass: 723 to 753 parts of fine aggregate; 1011 to 1101 parts of coarse aggregate; 152 to 172 parts of water; 144 to 160 parts of cement; 98 to 112 parts of mineral powder; 81 to 91 parts of fly ash; 5.3 to 5.9 parts of a water reducing agent; 20 to 70 parts of polyvinyl alcohol fiber; 2.4 to 3.5 parts of zinc acetate; 1.8 to 4.2 parts of dry ice; and 4.1 to 7.3 parts of sodium pyrosulfite. The product provided by the invention has the advantage of improving the crack resistance of concrete.

Description

Technical field [0001] The present invention relates to the field of concrete, and particularly to a method for preparing concrete cracking. Background technique [0002] In recent years, with the vigorous development of the domestic construction industry, the performance and strength requirements of the construction process of continuous improvement of concrete; concrete refers to the use of cement, sand, stone and water, additives and admixtures with a certain percentage, by mixing, molding, obtained by curing cement concrete. Because concrete is extremely rich in raw materials and inexpensive, and can adapt to a variety of purposes, have better resilience to natural conditions, as the current most widely used in construction projects, the most important basic materials. [0003] With the increase of strength of concrete, the concrete will deteriorate the toughness of the concrete cracks, thereby resulting in reduced properties of the concrete; crack over time, the concrete sur...

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Problems solved by technology

[0003] As the strength of concrete increases, the toughness of concrete will deteriorate, causing cracks in concrete, resulting in a decrease in concrete performance; as time goes by, cracks on the surface of concrete will expand rapidly, easily causing spalling

[0004] Usually the staff will increase the amount of cement when preparing concrete to increase the cracking strength of the concrete, but too much cement will lead to an increase in cost, and at the same time lead to an increase in the heat generated by the cement hydration reaction, making the temperature difference between the inside and outside of the concrete too large Large, if the heat dissipation is not timely, it will also cause cracks in the concrete

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