Gypsum cements

Inorg. adhesives inorganic adhesives cement, gypsum. 

Glass, carbon, ceramic, quartz, and polymer microspheres together with inorganic materials such as cement, gypsum, lime, and metals have all been used as fillers37> 88). 

E.g., inorganic materials (ceramics, glass, porcelain) can be waterproofed with easily hydrolysed alkylchlorosilanes (methyltrichlorosilane, dimethyldichlorosilane, ethyltrichlorosilane, diethyldichlorosilane). Metals and porous materials (paper, leather, textile, plaster, cement, gypsum, etc.) should not be waterproofed with alkylchlorosilanes, because they release hydrogen chloride, which destroys these materials. Alkylchlorosilanes can be successfully replaced with silicone oligomers with aminogroups or hydrogen atoms in the molecule. 

Another technique of solid foam preparation is based on gas formation in a melted polymerising bulk or in concentrated water suspension of binding materials (cement, gypsum, lime), occurring after physical or chemical processes. It is also possible to incorporate air in a polymerising or solidifying substance bulk. For example, cellular-concrete represents a material in which gas bubbles are uniformly distributed in the bulk. The material produced when suspensions of binding substances are mixed with a foam is called cellular (foam) concrete. If the gas is formed in the concrete bulk as a result of a chemical reaction, for instance, in the reaction of aluminium powder with the liquid phase of the concrete solution, a gas-concrete is produced. 

UF, urea-formaldehyde resin MUF, melamine fortified UF resin MF/MUF, melamine and melamine-urea resins (MF resins are only used mixed/coreacted with UF resins MUPF, melamine-urea-phenol-formaldehyde resin PF/PUF, phenol and phenol-urea-formaldehyde resin (P)RF, resoreinol-(phenol-)formaldehyde resin PMDI, polymeric methylenediisocyanate PVAc, polyvinylacetate adhesive old nat.adhesives, old (historic) natural adhesives (e.g., starch, glutin, casein adhesives) nat.adhesives, natural adhesives (e.g., tannins, lignins, carbohydrates) inorg.adhesives, inorganic adhesives (e.g., cement, gypsum) activation activation constituents of wood to function as adhesives (i.e., lignin). 

M Portland Aluminate Cement Gypsum - Cement Former USSR ... 

With the use of Ono s Method and microscopy of raw feed, clinker, cement, gypsum, and kiln dust, coupled with laboratory burns and sieve analysis of the raw feed, Vanisko (1978) demonstrated the deleterious effect of belite nests in development of mortar strength. He showed that coarse quartz was correlated with numerous large belite nests and, when the raw sand was separately and more finely groimd, mortar strengths jumped to 41 MPa. 

Dichioro-2-propanoi 2,3-Dichioro-1-propanoi isoamyi acetate cement, contact Taii oii qiycerides cement, gypsum Potassium suifate cement, iens assembiy Baisam Canada (Abies baisamea) cement, metais Lead oxide, yeiiow cement, microscopy Baisam Canada (Abies baisamea) cement, portiand... 

To obtain sulfobelite cement the clinker that is produced must be ground to a specific surface area similar to that of ordinary Portland cement. Gypsum or anhydrite must be added only if the amount of anhydrite in the clinker is insufficient. The grindability of sulfobelitic clinkers is better than that of typical Portland cement clinkers. 

Calcium aluminate cement+Portland cement+ gypsum... 

Type M expansive cement is a combination of ordinary Portland cement, calcium aluminate cement, and additional gypsum or calcium hemihydrate, typically in the ratio 66 20 14 (Mikhailov, 1960 Budnikov and Kravchenko, 1968). It may be produced by mixing these constituents in a plant. Alternatively, an expansive additive consisting of high-alumina cement, gypsum or henuhydrate, and hydrated lime may be added to the fresh concrete mix during mixing. By this approach the extent of expansion may be controlled by the amount of additive added to the mix. 

The Rosin-Rammler (1933) distribution was first developed for broken coal, but it has since been found to be applicable to many other materials, such as cement, gypsum, magnetite, clay, dyestuffs, quartz, flint, glass, and ores. From probability considerations, the authors obtained... 

Concrete is a mixture of a coarse-grained aggregate, hydraulic binding agents (cement, gypsum, lime, asphalt, sulfur, and resin), and water (except in the case of sulfur and resin, where water is not needed). For a limited period after preparation, the mixture can be molded into different shapes until hardening occurs as a result of chemical reactions between the components. 

Monford, G. E., Properties of Expansive Cement Made with Portland Cement, Gypsum and Calcium Aluminate Cement, J. PCA Res. Dev. Lab, 2 2 (1964)... 

Most of the developments with FRC involve the use of ordinary Portland cements. However, high alumina cement, gypsum and a variety of special cements have also been used to produce FRC, generally to improve the durability of the composite, or to minimize chemical interactions between the fibres and the matrix. Recent developments also include specially formulated mortar and concrete matrices with controlled particle size distributions. 

Uses Dispersant, water reducer, wet grinding aid for high soiids aq. disps. and suspensions, oii weii cementing, concrete, cement, gypsum waiiboard water reducer for metal oxides... 

Trade Names Polity PS-1900 Versa-TL 70 fersa-TL 77 Versa-TL 502 Sodium/potassium naphthalene-formaldehyde sulfonate Uses Dispersant for emulsion polymerization, dyestuffs, tanning, herbicides, pesticides, pitch, concrete, cement, gypsum Trade Names Daxad 14C Sodium potassium naphthalene sulfonate Ionic Nature Anionic... 

Analysis conditions cement Gypsum C3S ettringite furnace slag 28 days... 

---