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一、加荷速度问题在国家标准和部颁标准中,一些常用的建筑材料测定抗压强度时,对加荷速度都有明确的规定,如混凝土抗压试验规定连续而均匀地加荷,加荷速度是每秒钟2～3公斤/厘米~2;水泥抗压试验是每秒钟20公斤/厘米~2;粘土砖抗压试验是每秒钟5公斤/厘米~2;而砌筑砂浆(以下简称砂浆)则是每秒钟为其预定破坏荷载的10％,只有时间(秒)要求,而没有明确的施加荷载的规定。例如,50号砂浆试块的强度极限为2500公斤,则每秒钟应施加荷载250公斤,即为5公斤/厘米~2;当砂浆为100号时,其试块强度极限为5000公斤,则每秒钟应施加荷载
First, the loading speed problem In the national standards and ministerial standards, some commonly used building materials to determine the compressive strength, there are clear rules for the loading rate, such as the concrete compression test requirements continuous and uniform loading, plus The charge speed is 2 to 3 kg/cm~2 per second; the cement compression test is 20 kg/cm~2 per second; the clay brick compression test is 5 kg/cm~2 per second; and the masonry mortar (Hereinafter referred to as mortar) is 10% of its scheduled breaking load per second, only the time (seconds) requirement, and there is no clear application of load regulations. For example, if the strength limit of No. 50 mortar specimen is 2500 kg, then 250 kg of load should be applied per second, ie 5 kg/cm 2 . When the mortar is No. 100, the strength limit of the specimen is 5000 kg. Every second should apply load