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烧结普通砖的抗压、抗折强度是评价其质量优劣的重要指标,无论是生产单位、使用单位还是质检部门,在完成外观质量检验后,都将进行这两项指标的测定并力求尽早得出结果.但根据现行国家标准,测定抗压强度须将折断的砖用水泥浆制成试件并经3天养护,试验周期长.为解决这一问题,国内许多单位进行了多方面的研究并提出了多种测定方法,如“侧压法”、“测定切断压力法”、“磨制小试块加压法”、“超生波法”、“回弹仪法”等等.这些方法均是通过测定烧结普通砖的某一特征值后经过回归、换算而得到抗压强度的.我国幅源辽阔,各地烧结普通砖不同程度地掺入炉渣内燃烧砖,其抗压强度与这些特征值间的关系将有很大差异.同时,这些方法省略了抹水泥浆,其试验结果无法反映出砖在实际使用时彼此间的整体工作性,所以难于广泛推广.
The compressive and flexural strength of sintered ordinary brick is an important index for evaluating its quality. Whether it is a production unit, a use unit or a quality inspection department, after the appearance quality inspection is completed, the determination of these two indicators will be carried out and the As soon as possible, the results were obtained. However, according to the current national standards, the broken bricks should be made of cement slurry and tested for 3 days. The test cycle is long. To solve this problem, many domestic units have conducted many aspects. A variety of measurement methods have been studied and proposed, such as “side pressure method”, “measurement cutoff pressure method”, “grinding small test block pressure method”, “supersonic wave method”, “rebound method method”, etc. The method is to obtain the compressive strength through regression and conversion after determining a certain characteristic value of the sintered ordinary brick. China has a vast source, and the sintered ordinary bricks are mixed into the slag combustion bricks to different extents, and their compressive strength is similar to these. The relationship between the eigenvalues will be very different. At the same time, these methods have omitted the wiping slurry, and the test results cannot reflect the overall workability of the bricks in actual use, so it is difficult to widely promote.