Method for preparing ultra-high strength mortar

Abstract

The invention pertains to the technical field of constructional materials, which relates to a preparation method of super-high-strength mortar. The invention is characterized in that the weight percentages of raw materials and all the components thereof are that: 35 percent to 50 percent of concrete, 5 percent to 15 percent of silicon powder, 25 percent to 35 percent of silica sand, 3 percent to 10 percent of quartz sand, 0.1 percent to 0.2 percent of foam killer, 7 percent to 14 percent of water and water reducing agent is 1.5 percent to 4.5 percent of the sum of the mass of the concrete and the silicon powder (namely, gelled material), and the gross of the components reaches 100 percent; a variable speed stirrer is used for stirring, which is speeded up by changing gear and then positioned on a vibration table or inserted with a vibratory tamper for vibration and the maintenance process of existing concrete with high performance is used for maintenance. The intensity of the super-high-strength mortar of the invention can reach 150MPa and the invention has the advantages of ready availability of raw materials, simple preparation technique, being easy to be realized in construction site and being suitable for engineering.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to a preparation method of super high-strength mortar. Background technique [0002] Some engineering buildings, especially buildings with erosive environments, such as the ground of chemical plants, food processing plants, cold storage, heavy machinery plants, etc., as well as the construction of ports and ocean platforms, and radioactive waste storage containers, require a lot of low-cost, Ultra-high-strength mortar that can be prepared on the construction site. [0003] The preparation of the existing ultra-high-strength mortar at home and abroad mostly uses ground Portland cement, ultra-fine silica fume (or slag, fly ash, etc.), fine quartz sand (or other high-quality fine aggregates, such as stainless steel Powder), water and superplasticizer, etc. When forming, apply a certain pressure and let it stand at room temperature for 1 day, then remove the mold, use a hot wat...

AI Technical Summary

Problems solved by technology

The cost of this method is still high, the process is relatively complicated, and it is still difficult to realize at the construction site; because the specific surface area of ​​the best domestic cement with a label of 62.5 can only reach 380.6m 2 / kg, the preparation of the mortar also needs imported cement

[0005] Due to the difficulty of preparing ultra-high-strength mortar at the construction site in the prior art, the concrete materials used in construction have low strength and low density, which is not ideal for some engineering buildings that require ultra-high-strength and high-density materials.