Dong shi project: how to control temperature bearing grouting material construction? Setting time and what factors? - Bearing grouting material national standards

Bearing grouting specification pedestal grouting material mixture pedestal grouting test specification pedestal grouting material service hotline 158 - 3830 - 4411 during the construction of a pedestal grouting material, in order to improve the turnover of the template, require new casting bearing grouting material is about to open mold as soon as possible. When the pedestal grouting material temperature is higher than the temperature is about to consider appropriate form removal time, to avoid the early cracks on the surface of the cause. New pouring early ripping, cause very large tensile stress at the surface, a 'temperature shock' phenomenon. In the early part of the casting, due to the hydration heat dissipation, surface cause considerable tensile stress, the surface temperature and the temperature is high, the demolition of the template, surface temperature, inevitably cause temperature gradient, which on the surface with gallas stress, stress superposition and hydration heat, combined with grouting material drying shrinkage, surface tensile stress to reach a lot of value, can lead to the risk of fracture, but it can be on the surface after dismantling templates covering light heat preservation material. Support of grouting material, mainly is high strength of aggregate and pedestal grouting cement adaptability, also related to the elements such as temperature. Cement grouting material and water mix up, plastic needed to cement began to lose time. From cement grouting material and water mixture to the slurry completely lost the plastic strength needed for the moment and begin to occur. Cement grouting material condensed moment in anhui high strength non-shrinkage grouting material construction has important significance, initial setting time don't huainan grouting mortar should be short, final set time shoulds not be too long. Website: WWW. godjc。 com