Lime is the first nonhydraulic cementitious material used in construction. Due to its rich raw materials, simple production equipment and low-cost, it is still widely used in construction projects. The raw material for lime is mainly rock which mainly contains calcium carbonate. The most commonly used raw material is limestone, in addition to dolomite and … Continue reading
Gypsum is an inorganic air-hardening cementitious material, mainly consisting of calcium sulphate. Using gypsum materials and relevant products have great significance for saving building materials resources and improving the technical level of building materials. Production cost, Raw material consumption, construction technology requirements and equipment costs are low and production efficiency is high. Gypsum materials have … Continue reading
Starch is one of the most prolific natural polymers, and is composed of amylose and amylopectin. Amylopectin molecules are much larger than amylase. Starch ethers are chemically modified from starch. Starch ether is one of the most cost-effective raw materials for the dry mortar industry. Its main function is adjusting the performance of the mortar … Continue reading
Decorative cement Decorative cement, including white cement and colored cement, is mainly used for architectural decoration projects and can be made into color mortar, or prepare a variety of white or colored concrete. Compared with materials, it has many advantages like easy to apply and shape, low cost, good environmental protection and durability. White … Continue reading
Sulphoaluminate cement Sulphoaluminate cement is a kind of special cement invented by China. It is a kind of hydraulic cementing materials which main mineral contents are anhydrous calcium sulphoaluminate and β-calcium silicate, made from raw materials like limestone, alumina and gypsum, through high temperature calcinations which is usually under 1300-1350 °C, adding different proportions … Continue reading
Aluminate Cement Aluminate cement, product code as CA, also known as high alumina cement, is made from bauxite or limestone through melting or sintering. It is a hydraulic binder which mainly contains fine monocalcium aluminate and dicalcium aluminate. If necessary, it is also possible to add an appropriate amount of α-Al2O3 powder in grinding cement … Continue reading
In Chinese GB 175-2007 Standard, general purpose portland cement is defined as hydraulic cementitious material made of Portland cement clinker and appropriate amount of gypsum and specified mixed materials. According to the variety and dosage of its mixed materials, it is divided into Portland cement, ordinary Portland cement, slag Portland cement, pozzolanic Portland cement and … Continue reading
Cellulose ethers influence on water retention and consistency in cement-based mortars 1. Introduction Factory-made mortars have been mostly implemented as masonry renderings, fixing tiles, self-levelling floors and so on. When mortar is applied on substrate, water may be absorbed by the substrate. This phenomenon can induce insufficient hydration of cement, and thus decrease mechanical properties … Continue reading
The Development History of Redispersible Powder As early as more than 1000 years ago, humans had discovered that the use of natural resin or protein materials can significantly improve the durability of inorganic adhesive materials. For example, Zhaozhou Bridge in China is a good case. This experience has continued into the modern era, especially … Continue reading
Basic Concept of Redispersible Powder The Redispersible Powder is the main additive of dry powder ready-mixed mortar such as cement-based or gypsum-based. The Redispersible Powder is a polymer of vinyl acetate and ethyl ester which is spray-dried and gathered from the original 2μm to form spherical particles of 80-100μm. Since the surface of these … Continue reading