The water-to-material ratio is not only to meet the needs of chemical reactions, but more importantly, to meet the needs of pouring and molding. It is a key process parameter that affects the formation of pores, pouring stability and product quality of autoclaved aerated concrete. Depending on the type and characteristics of raw materials, the ratio of calcium to silicon, and the amount of calcium materials composed of raw materials, the ratio of water to material is also different. Proper water-to-battery ratio can make the slurry have suitable fluidity, provide necessary conditions for gas generation, can make the slurry gas flow smoothly, the slurry consistency is suitable, so that the autoclaved aerated concrete can obtain a good pore structure and improve The strength of its products. The larger the water-to-material ratio, the greater the fluidity of the slurry and the faster the rate of gas generation, which easily leads to early collapse of the mold, the body has a long static stop time, and the product strength is low. The water-to-material ratio is small, and the slurry thickens quickly. When the green body develops, it is easy to hold the air, and the phenomenon of topping and horizontal fracture will occur, which will also reduce the strength of the product. Starting from the pore structure of autoclaved aerated concrete and the strength of the product, it is usually desirable to stabilize the water-to-material ratio in a small range and maintain a low value. It has been suggested that the optimal calcium-silicon ratio is not unique under the premise that the strength level specified in GB11968 is a qualified product. Every water-to-material ratio corresponds to an optimal calcium-silicon ratio. In this optimal calcium-silicon ratio The next corresponds to the highest intensity. If the water-to-material ratio is small, the calcium-silicon ratio is small, which can reduce the amount of calcium material, and the product ripens quickly, thus greatly reducing the product cost. The presumptuous name of autoclaved aerated concrete points to a clear path for energy saving and consumption reduction. In this way, high-quality autoclaved aerated concrete products will not be produced.
At present, whether it is production practice or scientific experimental research, the important role of the optimal calcium to silicon ratio is often overlooked, because the production of enterprises does not pursue the strength level of the blocks to meet the superior requirements, and scientific experimental research, such as the experimental research mentioned above Most of the goals are for the strength level to meet the requirements of qualified products specified in GB11968. Therefore, for decades, companies producing high-quality autoclaved aerated concrete products are rare.
If we change the decades-old tradition of producing low-grade products—autoclaved aerated concrete block qualified products, and produce high-quality products, there should be high-level product standards to lead, stimulate the enthusiasm of enterprises to produce high-quality products, and eliminate backward ones. And crude production process equipment and production technology, pay attention to the important influence of calcium-silicon ratio, water-to-material ratio and autoclaved curing system on the performance of autoclaved aerated concrete products, adopt the best calcium-silicon ratio, suitable water-to-material ratio and reasonable Of course, the autoclaved maintenance system of the company is also inseparable from the use of high-quality raw materials and strict production process management.
Post time: Sep-02-2020