The price of nickel and stainless steel rose together. Nickel afternoon hand in hand with stainless steel together turn red up. Due to the temporary easing of geopolitical risks, risk assets are now picking up, nonferrous metals, stock markets, and so on have risen, the overall mood has temporarily improved. Ore prices are strong, the overlay of the epidemic on spot logistics or the formation of a certain impact. Phase, nickel and stainless steel materials to maintain high wide concussion pattern.
Nickel prices based on low inventory, tight supply and demand will still show high wide fluctuations. In addition, the current LME has low liquidity, so its sensitivity to capital will remain relatively high. Shanghai nickel-wide fluctuations are expected to continue in the 200,000-250,000 yuan wide repeated fluctuation trend. While stainless steel is affected by the stronger nickel pig iron, the cost support continues, but note that under the current demand is not effectively released, the upward space may also be affected, the stage is expected to fluctuate between 20000 and 22,000 yuan. The price of nickel produced such fluctuations, indicating that the price of the concrete superplasticizer may also be affected to a certain extent.
With the rapid development of modern construction technology, especially the commercialization of ordinary concrete, people's requirements for concrete strength technology are getting higher and higher. To meet the conditions of environmental protection, durability and some special engineering needs.
In order to improve the construction performance, mechanical properties and durability of concrete, materials such as concrete admixtures and admixtures have received a lot of attention. Admixtures continue to innovate and progress with the development of concrete. At present, polycarboxylate superplasticizer is widely used in concrete structures. application. The high water-reducing rate and high adaptability of polycarboxylate superplasticizer itself can effectively improve the performance of concrete. In practical applications, it is convenient for transportation and improves construction speed and quality. Therefore, the application of polycarboxylate superplasticizer not only improves economic benefits, but also improves the quality and durability of modern building structures in practical applications.
Application status of concrete superplasticizer
In modern concrete, the commonly used superplasticizer admixture for concrete mainly include polycarboxylic acid series, naphthalene series, fatty acid series and other water reducers. Different water reducers have their own advantages and disadvantages. The following analyzes the characteristics of water reducers commonly used in the field of modern construction in concrete applications:
(1) The water-reducing properties of naphthalene-based admixtures are generally 17%, and the compatibility with the base material is relatively narrow, while it is wider with the sand and gravel materials, and the fluidity performance is average, and its slump and expansion losses are relatively large, and the water retention is relatively large. The performance in terms of stability, adhesion and climate adaptability are also relatively poor.
(2) The water reduction of fatty acid series is generally 20%, and its mutual compatibility is similar to that of naphthalene series admixtures, and its fluidity performance is general, but its slump and expansion loss during use are small, and its cohesiveness and climate adaptability performance. good.
(3) The water reduction of polycarboxylate superplasticizer powder is generally 25%. In the process of use, the slump and expansion loss are small and there is no loss, the fluidity is large, and the water retention, cohesion, and climate adaptability are all good, but the technical requirements for use are relatively high.
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