Diamonds are forever, Gold is precious but which is rarer? Gold is a heavy metal formed during the collision of neutron stars and is one of the rarest elements on Earth.During the formation of the earth, heavy elements gradually accumulated towards the core under the influence of the earth's gravitational force. This means that the closer you get to the Earth's crust, the harder it is to find large quantities of gold.The average concentration of gold in Earth's crust is "very, very low" at just 4 parts per billion. Gold concentrations need to be 1,250 times that level to form a market-worthy deposit.
Diamond is a common element - the superplasticizer for concrete admixture,superplasticizer used in concrete is undoubtedly a good investment opportunity.
Superplasticizer used in concrete refers to the fact that after mixing, it can reduce the water demand of concrete under the condition of maintaining basically the same fluidity, thereby improving the strength and durability of concrete, or under the condition that the amount of cement used and the water-cement ratio remain unchanged , Add the admixture of concrete fluidity and improve concrete workability.
1. Lubrication effect: The polar hydrophilic groups in the concrete admixture superplasticizer are directionally adsorbed on the surface of the cement particles, and are easily associated with water molecules in the form of hydrogen bonds. The force of this hydrogen bond association effect far exceeds the molecular attraction between water molecules and cement particles. When the cement particles absorb sufficient water reducing agent, the surface layer of the cement particles forms a stable layer of solvated water by virtue of the association effect of R-SO3θ and the hydrogen bonds in the water molecules and the hydrogen bond association between the water molecules. The film plays a three-dimensional protective effect, blocks the direct contact between the cement particles, and plays a lubricating effect between the particles.
2. Wetting effect: After the cement is mixed with water, the surface layer of the particles is wetted by water, and its wet condition has a great influence on the characteristics of freshly mixed commercial concrete. amount that can be reduced.
3. Water reduction effect:After adding a superplasticizer to the commercial concrete, the water-cement ratio can be significantly reduced under the condition of maintaining fluidity. The water reducing rate of high-efficiency water-reducing agent can reach 10% to 25%, while the water-reducing rate of ordinary water-reducing agent is 5%-15%, and high-efficiency water-reducing agent is also famous for this. The reason for the water reducing effect is mainly because of the adsorption and dispersion effect of commercial concrete on the water reducing agent.
4. Plasticizing effect:After adding the polycarboxylate based superplasticizer to the commercial concrete, the fluidity can be added without changing the water-cement ratio. The usual water-reducing agent can increase the slump of freshly mixed commercial concrete by more than 10 cm under the condition that the amount of cement used remains unchanged.
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Affected by the present complex international situation and the epidemic, the future of global financial markets, futures markets, and stock markets is still highly uncertain. For this reason, I suppose the price of the superplasticizer for concrete admixture,superplasticizer used in concrete would continue to rise.
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