Materials composition and process of cement perlite mortar
Author：ANT CONSTRUCTIONS Comefrom： Createdate：2020/11/19 10:05:54 Hits：45
Materials composition and process of cement perlite mortar
Raw material composition of dry mix thermal insulation cement perlite mortar
dry mix thermal insulation cement perlite mortar is also called ready-mixed mortar and dry-mixed mortar. It is a semi-finished mortar made by accurate ingredients and uniform mixing in the factory. It can be direct used by adding water and stirring at the construction site. There are many types of dry powder (mixed) mortar, and its composition is also more complicated. In summary, it is composed of cement, filler, mineral admixture, additives and other materials.
1.Cementing material,
The commonly used binders for dry mix thermal insulation cement perlite mortar are: Portland cement, ordinary Portland cement, high alumina cement, calcium silicate cement, natural gypsum, lime and mixtures of these materials. Portland cement (usually Type 425) or Portland white cement are the main binders. Some special cements are usually used in floor mortar. The amount of binder mateirals accounts for 20-40 of the weight of the dry blending product.
2. Water retention thickening material,
dry mix thermal insulation cement perlite mortar commonly thickening powder is as a water-retaining and thickening material. It achieves the purpose of thickening and water-retaining of the mortar through physical adsorption of water molecules. It is safe, non-toxic, non-radioactive and corrosion-free.
4.The filler mateirals,
The main fillers of dry mix thermal insulation cement perlite mortar are: sand, quartz sand, limestone, dolomite, expanded perlite, etc. These fillers are crushed, dried, and then sieved into three categories: coarse, medium size and fine. The particle size is: coarse filler 4mm~0.4mm, medium filler 0.4mm-0.1mm, and fine filler below 0.1mm. For products with small particle size, fine stone powder and sorted limestone should be used as aggregates, and the limestone should be as white as possible. ordinary dry mix thermal insulation cement perlite mortar can be crushed limestone or dry and screened sand as aggregate. If the sand quality is sufficient for high-grade structural concrete, it must meet the requirements for producing dry mixes. The key points to the production of reliable dry mix thermal insulation cement perlite mortar are the control of the raw material particle size and the accuracy of the feeding ratio, which is realized in the automatic production of dry mix thermal insulation cement perlite mortar.
5. Mineral admixtures,
The mineral admixtures of dry powder (mixed) thermal insulation mortar are mainly: industrial side products, industrial waste and some natural ores, such as: slag, fly ash, pozzolan, fine silica powder, etc. The chemical composition of these admixtures is mainly containing the silico-aluminum hydrochloric acid of calcium oxide which is soluble in water and has only high activity and hydraulicity.
6.Additives,
additives are the key points of dry mix thermal insulation cement perlite mortar. The type and quantity of additives and the adaptability between additives decided the quality and performance of dry mix thermal insulation cement perlite mortar. In order to increase the workability and cohesiveness of dry mix thermal insulation cement perlite mortar, improve the crack resistance of mortar, reduce permeability, make the mortar unsuitable for bleeding and separation, thereby improving the construction performance of dry mix thermal insulation cement perlite mortar and reducing production costs.
Production process of dry mix thermal insulation cement perlite mortar
1. Special difference when producing cement perlite mortar
The production process of dry mix thermal insulation cement perlite mortar includes original ingredients preparation, quartz sand drying, sieving, and crushing and grinding of limestone if necessary. Cement and fillers are generally fed into raw material silos by pneumatic pump, and additives can be manually poured into small raw material silos or tanks through elevators. Most of the current production forms are vertical "towers type". In the new dry powder (mixed) mortar production plant, the unique powder flow technology is adopted for feeding, and the original horizontal feeding equipment is abandoned. It has the characteristics of large capacity, high precision and good flexibility.
2. Cement perlite mortar specialty
Compared with traditional mortar, traditional mortar is mixed and used at the construction site, which needs a certain amount of space, and the powder will cause a certain environmental pollution to the site. At the same time, the materials are stacked on the muddy ground in the open, resulting in more impurities and large mud content. Inaccurate metering of ingredients, difficult to control ease of workability, and large arbitrariness in aggregate screening, resulting in high porosity, high shrinkage, and poor impermeability of the mortar, which may eventually lead to hollowing, cracks, and cracks in the plastering of external walls, infiltration occurs. In contrast, all ingredients of dry mix thermal insulation cement perlite mortar are accurately metered in the production workshop and thoroughly mixed, and then mixed with water according to the determined water-cement ratio on site. It overcomes many problems such as inaccurate metering of ingredients, environmental pollution, excessive mud content, etc. It has the characteristics of low bleeding, low shrinkage, strong bonding, crack resistance and impermeability, and can basically meet the requirements of new wall materials .
3. Social and economic benefits,
dry mix thermal insulation cement perlite mortar is a new product with rapid development and great development potential in the field of building materials. In Europe, there are almost two dry powder (mixed) mortar production plants for every city with an average of 1 million people. Only a small part of the gypsum and mortar used in construction are still mixed and prepared on site. Calculated according to this standard, taking Jiangsu Province as an example, with a population of 74 million in the province, at least 148 dry powder (mixed) mortar production plants are needed to meet market demand. At present, there is almost no dry powder (mixed) mortar production plant in Jiangsu. The development of dry powder (mixed) mortar products is only just beginning. In the next few years, the growth rate of domestic dry mixes will be unprecedentedly high.
Your mixer specialist for dry mortar, limestone and all concrete building materials, for next generation dry mortar mixing and processing solutions that make a difference, please visit antdrymix.com
each mixer designed and configured individually in order to meet your
specific mixing requirements
intensive mixing action combined with extremely low wear maximum product and batch size flexibility,
also ideal for the very smallest batch sizes minimal contamination
low energy consumption
