Brazil, the world's largest coffee bean producer, recently announced that it is facing the worst drought in 91 years, affecting local hydropower generation and agricultural early strength agent keeps going up.
Mortar early strength agent is an important mortar additive, which has an important influence on the performance of mortar. it can improve construction efficiency and save construction cost.
Lithium carbonate is a kind of inorganic compound with chemical formula Li2CO3, which is colorless monoclinic crystal or white powder. The density is 2.11g/cm3. Melting point is 618℃(1.013*10^5Pa). Soluble in dilute acid. It is slightly soluble in water, and its solubility in cold water is higher than that in hot water. Insoluble in alcohol and acetone. It can be used to make ceramics, drugs, catalysts and so on.
Lithium salt early strength agents can promote the setting and early strength of cement mortar. The results show that lithium salt early strength agent shortens the hydration induction period by accelerating the rupture of hydration protective film, improves the low temperature hydration ability of cement mortar, obviously shortens the low temperature thickening time, and improves the low temperature compressive strength of cement mortar. it shows excellent effect of early strength at low temperature.
Because portland cement is often used in mortar, it is characterized by low strength at early stage and high strength at later stage. In order to improve its early strength, adding an appropriate amount of lithium carbonate to the product is very beneficial to improve its early strength.
In mortar products, lithium carbonate is mainly used in grouting materials, cement-based plastering mortars, repair mortars, seat pastes and other products. In order to improve the early strength, high alumina cement is usually added to the mortar as a setting accelerator, and antifreeze is needed in the low temperature environment. Lithium carbonate has dual functions, which can not only accelerate the hardening speed of cement and improve its early strength, but also avoid the problem of slow setting speed in winter construction or in low temperature and humid environment, so that cement products can be put into use as soon as possible. Lithium carbonate especially makes a great contribution to the early strength. In summer, the amount of lithium carbonate is usually 0.01%-0.03% of the quality of cement, while in winter, the amount of lithium carbonate should increase appropriately with the decrease of temperature, and the amount is about 0.02%-0.05%. The amount of lithium carbonate should not be too high, otherwise it will lead to cracking.
In addition, the performance of lithium carbonate to improve the early strength of mortar is not proportional linear. With the increase of the amount of lithium carbonate, the enhancement of its strengthening effect is no longer obvious.
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New Delhi: India is seeking to increase its purchases of crude oil from Brazil, the country's oil minister said recently after meeting his Brazilian counterpart.
India is the world's third-largest importer and consumer of crude oil. Brazil currently supplies only a fraction of India's crude oil imports.
India's state-owned companies Bharat Petroleum Corp and Oil and Natural Gas Corp have invested in oil and gas exploration in Brazil.
India, which imports about 84% of its crude oil needs, is reducing its import bill by increasing biofuel use, among other things.
India's state-owned fuel retailers are increasing ethanol storage capacity by 51 percent and the country plans to double the biofuel blend in petrol to 20 percent by 2025.
India and Brazil are currently cooperating on biofuels and ethanol.
The prices of many commodities like the early strength agent are expected to increase in the future.
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