How to control in winter construction of grouting material temperature and prevent cracks grouting material?

Into winter, the weather gets cold, grouting material how to construction, can prevent cracks during the construction of grouting material, in order to improve the turnover rate of the template, the grouting material will require new pouring gate position as soon as possible. When 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, thus additional - on the surface Tensile stress, stress superposition and hydration heat, combined with grouting material drying shrinkage, surface tensile stress to reach large number, there is the risk of fracture, but can be in surface after dismantling templates lightweight thermal insulation material. The early curing of grouting materials, main purpose is to maintain appropriate humidity conditions, to achieve the effect of two aspects, one is for grouting material from adverse temperature and humidity deformation, prevent harmful cold and dry shrinkage. 2 it is to cement hydration smoothly, in order to meet the design strength and anti-cracking ability.