Modified cement-based antishock and wear-resistant material and preparation and application methods thereof

Abstract

The invention discloses a modified cement-based antishock wear-resistant material and preparation and application methods thereof. The modified cement-based antishock wear-resistant material comprises the following components in percentage by mass: 5 to 10% of polyoxyethylene ether, 20 to 30% of anionic active agent, 30 to 40% of carrier and 30 to 40% of nanometer polar silicon modifying material. The preparation method comprises the following steps of: compositing polyoxyethylene ether and the anionic active agent onto the carrier; adding the nanometer polar silicon modifying material to the obtained composite; and homogenizing to obtain the modified cement-based antishock wear-resistant material. The application method comprises the following steps of: uniformly mixing weighed sand and aggregate; adding cement, fly ash and the modified cement-based antishock wear-resistant material; uniformly agitating; adding mixing water and a water reducing agent; and uniformly mixing to obtain concrete. The modified cement-based antishock wear-resistant material has high antishock wear-resistant performance; the preparation method is simple and mild in conditions; the process parameters are easily controlled; the yield is high; and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and relates to a modified cement-based anti-impact and wear-resistant material and a preparation and application method thereof. Background technique [0002] Impact and wear resistance is the durability of concrete in a special environment. It mainly occurs on the surface of high-head drainage buildings in water conservancy and hydropower projects, road surfaces, bridge decks in traffic engineering, and other parts that are in direct contact with vehicles. In recent years, in the construction and operation of many island-connecting projects, sea-crossing bridges, and river-crossing bridges, it has also been found that the sand-carrying water has the effect of scouring key parts such as bridge piers and bridge caps, which has caused serious abrasion damage to concrete. , it can be considered that the impact and wear resistance of concrete determines the safe service life and operation...

AI Technical Summary

Problems solved by technology

In the way of improving the performance of impact-resistant and wear-resistant concrete, researchers mainly modify it from the aspects of aggregates, cementitious materials, chemical admixtures, fibers, etc., considering wear-resistant aggregates, such as iron and steel sand, but its The price is relatively high, and the transportation distance is often long, which increases the unit production cost of concrete; the early high shrinkage of cementitious materials, such as silica fume, the high cost of fibers, and the difficulty of uniform dispersion in concrete affect the performance and workability of concrete. Therefore, the development of high-efficiency impact and wear-resistant chemical admixtures has become an effective way to improve the wear resistance of concrete.

In the past, most of the wear-resistant agents were mixed with a large amount of organic wear-resistant ingredients, such as rubber powder, fiber and nylon. The impact and wear resistance of the matrix itself is low, and the organic components cannot produce good adhesion with cement-based materials. Abrasion-resistant components have limited ability to improve the abrasion resistance of concrete

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