Baking-free hollow thermal insulation blocks and preparation method thereof

Abstract

The invention discloses baking-free hollow thermal insulation blocks and a preparation method thereof. The baking-free hollow thermal insulation blocks are characterized by being prepared from the following raw materials in part by weight: 100 to 115 parts of waste ceramsite, 110 to 130 parts of cement, 90 to 100 parts of flyash, 23 to 27 parts of pearlstone, 190 to 210 parts of mountain flour, 170 to 190 parts of rive stone, 170 to 190 parts of river sand and 39 to 41 parts of water. Waste ceramic is adopted to be prepared into the waste ceramsite to replace partial natural sandstone, and the flyash replaces partial natural sand and cement, so that the damage to natural resources is reduced. The pearlstone is adopted to serve as fine aggregate of concrete to regulate the porosity of mortar and improve construction workability. The product has good mechanical properties and durability, also has good thermal insulation property, improves the thermal insulation capacity of buildings, and is suitable for various thermal insulation projects. The use and construction of the baking-free hollow thermal insulation blocks are same as that of a common block construction method. The technical scheme has the advantages that: the process is easy to operate, the raw materials are readily available and cheap, the production cost is lower, and the economic and social benefits are better.

Description

technical field [0001] The invention belongs to the technical field of building heat preservation, and relates to a fire-free hollow heat preservation block and a preparation method thereof. Background technique [0002] China is currently the world's largest brick building country. According to the statistics of China Building Block Association, the annual output of small concrete blocks in my country was 6 million m in 1992. 3 , reached 2000m in 1993 3 (Converted to 14 billion bricks), the annual output in 1998 has reached 3500m 3 , the total area of ​​various blocks reached 80 million m 3 . According to incomplete statistics, in 1999 the total completed area of ​​block buildings was close to 200 million m2. 3 . In 2009, the total construction area of ​​houses in my country was 40 billion m 2 , will reach 70 billion m by 2020 2 . In the past, there was insufficient understanding of building energy conservation. A large number of buildings are high-energy buildings....

AI Technical Summary

Problems solved by technology

[0030] (2) During the construction of ceramsite concrete, pay special attention to vibration and tamping. Since the density of ceramsite is smaller than that of water, if there is a slight improper construction and vibration, all ceramsite in the concrete will float up, resulting in segregation and affecting the concrete structure.

Due to the high water absorption rate and the great destructive force of frost heaving, the blocks have poor frost resistance. After 25 freeze-thaw cycles, there will be serious missing edges and corners, and the strength loss will reach more than 30%, which seriously affects the product quality and engineering quality.

However, due to the porosity of the artificial lightweight aggregate, the mechanical characteristics of the lightweight aggregate are very different from those of ordinary concrete, and there is generally a strength limit; the coarse aggregate (such as slag, etc.) in lightweight concrete is relatively light, and most of them are Spherical shape, easy to float, causing layered segregation of concrete; and porosity brings high water absorption rate to lightweight aggregate, which reduces concrete slump and lower product strength; The water-cement ratio at the interface between the aggregate and the cement stone is increased, the strength of the transition zone is reduced, and even the strength loss and durability of the small lightweight aggregate blocks are caused.

In the prior art, some technical schemes use too many organic chemical products as raw materials, which makes the production cost of thermal insulation blocks higher

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