外文翻譯---商品混凝土早期裂縫的成因及防治措施(已改無錯字)
2023-07-06 10:23:58 本頁面
【正文】 ulting in a large number of hydration heat is not easy to distribute, the internal temperature rising , and the concrete surface heat faster, so have a temperature gradient inside and outside the crosssection, especially when the 4 temperature difference between day and night, the temperature difference between inside and outside the greater thermal expansion of concrete deformation of the internal pressure, external concrete shrinkage deformation, resulting in tensile stress, as the concrete in this when the lower tensile strength, internal tensile stress when the concrete tensile strength of more than concrete, the concrete will crack, the crack gap generally deeper, and sometimes a crosscutting nature, the basement of a project for film rib raft foundation beam, rib 900 1600mm beam surface coefficient small, each cement concrete 425 R amp。 P for silicon cement 522kg, high hydration heat of cement, three days after pouringTemplate, in the atmospheric temperature of ℃ , the surface temperature rapidly, the formation of temperature gradient, low tensile strength of concrete, causing cracks in beams. Prevention is the mass concrete should be prepared with low heat of hydration of cement, such as slag cement, mixing expansion agent and, more importantly, the construction units to set up temperature measurement devices, thermal insulation at the same time take measures, such as the use of plastic film and bags coverage to to ensure that the temperature difference between inside and outside is less than 25 ℃ 4, the construction caused cracks To drive the progress of construction, pouring concrete does not meet the design strength, even in the casting that is less than 24 hours after the beginning of Master, piling up loads, often resulting in cracking plate. Consequently, only the supply of units and construction units work closely with the two sides and concrete products in strict accordance with the relevant standards, norms for the management of production and construction in order to effectively guarantee the quality of concrete. From 《 Construction amp。 Engineering Industry Profile》 United Kingdom 5 商品混凝土早期裂縫的成因及防治措施 摘要：本文就工程實際中容易出現(xiàn)的早期裂縫進行了分析和說明，同時也有針對性的介紹了一些防治措施。 隨著建設規(guī)模的不斷擴大及人們對建筑
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