An anti-segregation agent for concrete, which is characterized in that: it is mixed with component a, component b, montmorillonite, plastic retaining agent and aromatic hydrocarbons, wherein the component The mass fraction of a is 3%-15%, wherein component a is calcium sulfate or calcium formate or a mixture of calcium sulfate and calcium formate. The mass fraction of component b is 40%-70%, and component b is zeolite or silica fume or a mixture of zeolite and silica fume. The mass fraction of montmorillonite is 1%-10%, the mass fraction of plasticizer is 5%-15%, and the mass fraction of aromatics is 2%-10%. The plasticizer is: methylcellulose, yellow One of gum, dextrin and carrageenan. All aromatic hydrocarbons in this application refer to hydrocarbons containing benzene ring structures.
Preferably: the effect is better when the mass fraction ratio of calcium sulfate and calcium formate in component a is 3:2.
Preferably: the effect is better when the mass fraction ratio of zeolite and silica fume in component b is 1:1.
Preferably: the mass fraction of a is 10%, the mass fraction of b is 65%, and the mass fraction of montmorillonite is 5%, ensuring The anti-segregation agent prepared when the mass fraction of plasticizer is 10% and the mass number of aromatic hydrocarbons is 10% is better.
Silicon fume, also called microsilica fume or condensed silica fume, is an iron alloy produced in submerged thermal electric furnaces when smelting ferrosilicon and industrial silicon (metallic silicon). A large amount of highly volatile sio2 and si gases are released. After the gas is discharged, it quickly oxidizes, condenses and precipitates with the air. It is a by-product of large-scale industrial smelting. The entire process needs to be recycled with dust removal and environmental protection equipment. The silicon content is generally 80-92%.
Aromatic hydrocarbons are called aromatic hydrocarbons, which generally refer to compounds containing benzene rings in their molecules. The aromatic hydrocarbons referred to in the present invention refer to compounds containing benzene rings. compound of.
Zeolite is the general name for zeolite minerals and is a water-containing alkali or alkaline earth metal aluminum silicate mineral. More than 40 kinds of natural zeolites have been discovered around the world, the most common of which are clinoptilolite, mordenite, chabazite, erionite, philanderite, heulandite, turbidite, stilbeolite and analcite. Clinoptilolite and mordenite have been widely utilized. Zeolite minerals belong to different crystal systems. Most of the crystals are fibrous, hair-like, columnar, and a few are plate-shaped or short columnar.
Zeolite has ion exchange properties, adsorption and separation properties, catalytic properties, stability, chemical reactivity, reversible dehydration, electrical conductivity, etc. Zeolite is mainly produced in the cracks or amygdala of volcanic rocks, symbiotic with calcite, chalcedony, and quartz; it is also produced in volcaniclastic sedimentary rocks and hot spring deposits.
The name of montmorillonite comes from the place where it was first discovered – montmorillon in France. The smectite subgroup is one of the smectite minerals (the other subgroup is saponite). It is an important clay mineral, generally in the form of massive or earthy materials. Molecular formula (na,ca)0.33(al,mg)2[si4o10](oh)2·nh2o, a clay mineral with a three-layer sheet structure composed of aluminum-oxygen octahedron in the middle and silicon-oxygen tetrahedron above and below. In the crystal The structural layers contain water and some exchange cations, which have a high ion exchange capacity and a high water absorption and expansion capacity. Montmorillonite crystal is a water-bearing layered structure silicate mineral of the monoclinic system.
Montmorillonite particles are very small, about 0.2 to 1 micron, and have colloidal dispersion properties. They are usually produced in the form of massive or earthy aggregates. Montmorillonite can be seen as flaky crystals under an electron microscope, with colors ranging from white gray to light blue or light red. When the temperature reaches 100~200℃, montmorillonite will gradually lose water. Montmorillonite after losing water can also reabsorb water molecules or other polar molecules. They can also expand several times their original volume when they absorb water. Montmorillonite has many uses, and its properties are used in chemical reactions to produce adsorption and purification. It can also be used as a filler in papermaking, rubber, and cosmetics, as a raw material for petroleum decolorization and petroleum cracking catalysts, and as mud for geological drilling, adhesives for metallurgy, and medicine (mainly manufacturing montmorillonite powder).
The water content of montmorillonite changes greatly due to environmental humidity, and its composition is generally (na,ca)0.33(al,mg)2(si4o10) (oh)2·nh2o. Monoclinic crystal system, crystals are flaky, flocculent, or felt-like. There are negative protrusions in the thin section. Parallel extinction, positive ductility. Two-axis negative crystal. It is an exogenous mineral formed in alkaline medium, a weathering decomposition product of volcanic ash and tuff, and is the main component of bentonite, bentonite and fuller’s earth. Usually an earthy mass. White, sometimes tinged with red or green. The luster is dull. Hardness 1. The density is about 2. Very absorbent. After absorbing water, its volume expands and increases several times to more than ten times, and it has strong adsorption force and cation exchange performance. Because the clay containing this mineral is a high-quality slurry clay with a high pulping rate, it is often used as a water loss reducer and tackifier for drilling fluids in the petroleum industry, and is also used in oil refining, textiles, rubber, ceramics and other industries.
The montmorillonite used in this article is selected from materials containing montmorillonite components in Shandong.
This technology has the following advantages:
Low production cost, which is lower than the production cost of traditional products Saving more than 70%, this technology has good anti-segregation effect and quick effect. It can basically be put into the system of this technology.The effect can be seen three minutes after the product is mixed. It is very suitable for all kinds of concrete and can increase the strength of concrete by more than 35%. It is suitable for comprehensive promotion and application.
<img src="/upfile/202304/2023041334528065.jpg"/
微信扫一扫打赏
Chinese