A low-rebound high-strength shotcrete reinforcement

Abstract

The invention discloses a high-strength shotcrete reinforcing agent with low resilience and high stability, which comprises rice husk ash, cellulose nanofiber, six-carbon water reducer, plant polysaccharide and water. After the plant polysaccharide powder is fully swollen, the water reducer is added to fully stir, and then rice husk ash and cellulose nanofibers are added to stir quickly, so as to obtain a high-strength shotcrete reinforcement with low rebound rate and high stability. While ensuring the dispersibility and fluidity of the reinforcing agent, the invention can reduce the rebound rate of sprayed concrete to less than 2%, improves the stability, and solves the problems of stratification and precipitation caused by long-term placement. Avoid compromising enhancer performance. In addition, in the actual application process, the enhancer can be used in real time after being transported to the construction site. It has the advantages of accurate on-site addition and measurement, easy mixing and uniformity, environmental friendliness and pollution-free, etc., and can effectively reduce the rebound rate of shotcrete and improve the compressive strength. , impermeability, wear resistance and other properties, to provide convenience for the actual construction, with good performance and strong operational practicability.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a high-strength shotcrete strengthening agent with low resilience and high stability. Background technique [0002] According to the incomplete statistics of China Concrete Network, the total output of commercial concrete in my country in 2018 was 2.547 billion cubic meters. With the continuous improvement of my country's urbanization level, the concrete industry will continue to maintain steady growth. Concrete is an indispensable and important material in infrastructure construction, and its quality directly affects the service life of buildings. The emergence of concrete admixtures in the 1930s greatly improved the performance of concrete, promoted the development of concrete production and construction technology, and improved technical and economic effects, thus changing the fact that concrete is only composed of water, cement, sand, stone, etc. The concept of c...

AI Technical Summary

Problems solved by technology

At present, the application of shotcrete strengthening agent in our country has made great progress, but many problems have been exposed in the actual application process, which directly affects the performance of use, and even poses hidden dangers to the service life.

At present, there are mainly three problems: (1) Mixing is not easy to be uniform: most of the current concrete strengtheners are mixtures of various solid materials, and problems such as stratification and precipitation occur due to uneven mixing and long-term storage. Insufficient content of the effective components of the strengthening agent, thereby greatly reducing its performance, causing harm to the quality control of concrete, and even causing engineering accidents; (2) Low measurement accuracy: With the advancement of admixture technology, the admixture in concrete The proportion of it is getting smaller and smaller, so the accuracy requirements of its addition are getting higher and higher

In the process of on-site construction, in order to meet the measurement requirements, it is necessary to be equipped with a measurement system device with high measurement accuracy, and the requirements for the operation level and experience of the construction personnel are high. Accidents caused by improper addition of admixtures occur from time to time, which further leads to (3) High rebound rate: after the current existing concrete strengthening agent is added, the rebound rate in the spraying process is generally higher than 10%, which makes construction difficult

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