Qingdao sintered bricks must meet the following technical specifications: the standard of shape and size is 240mm*115mm*53mm. Its strength grade is divided into five grades, which are divided according to the average, minimum and standard values of the compressive strength of the 10 blocks.
Its third index is weathering resistance, which is an important index of its durability. It can usually be divided into three indexes: frost resistance, water absorption and saturation coefficient. The frost resistance mainly means that after 15 cycles of freezing and thawing, there will not be a phenomenon of cracking, delamination and skin loss, lack of angle and lack of edge. The water absorption is to keep it in the normal water for 24 hours and see its weight. The saturation coefficient is 24 hours of water absorption <. #)))) = h boiling water absorption ratio.
Qingdao should comply with the provisions of sintered brick lime burst value, burst area according to the grade have different requirements, there is a pan frost phenomenon is an important indicator, excellent products are not allowed pan frost phenomenon, the qualified product is not serious flooding, which can not be mixed with burnover, thread or crisp brick brick.