- concrete grouting material plastic shrinkage crack and prevention Gansu lanzhou grouting material

grouting grouting material manufacturer grouting material price model concrete crack prevention and control of grouting material engineering is throughout and clutter in the construction of modern engineering skills. Cracks are caused by the shortening of concrete grouting material, and shorten the inherent characteristics of concrete grouting material data. So when it can determine the degree, not only affects the integrity of the concrete grouting material structure and will also affect the structure durability and safety. So, concrete grouting material crack prevention by engineering attention and pay attention to. Concrete grouting material plastic shorten that occurred before the concrete grouting material of condensation of the shortened, the last time is relatively short, beginning in the concrete grouting material appearance luster disappears, the completion of concrete grouting material of condensation, shortened by plastic, concrete grouting material is still in the process of formation, the initial structure is still in the very weak conditions, when the plastic reduced increased and reduced stress, concrete grouting material not to resist stress, which induced Dali hair plastic shorten fracture grouting material manufacturer. In general, concrete grouting material plastic shorten the value about 1% of the volume unit cement dosage is sure. Plastic shorten and concrete grouting material for settlement effect caused by the moment tend to stack. One, the factors that affect the concrete grouting material plastic shorten first contains the following 1, activity of concrete grouting material; Generally low liquidity, plasticity and harsh concrete grouting material plastic shorten small, big mobility concrete grouting material plastic shorten, and the possibility of plastic shorten fracture. 2, cement type and dosage of mixed material; By mixing cement with concrete grouting material than ordinary cement concrete grouting material has more plastic shorten, incorporating more mineral admixture of concrete grouting material, plastic shorten. 3, plus the seam an agent; Plus the seam an agent affect concrete grouting material plastic condition, thus affect the plastic shorten intrusive. In general, mixing and subtract water beautiful seam an agent, super plasticizing beautiful seam an agent and hardening the seam an agent of concrete grouting material plastic shorten the smaller, mixed retarded beauty seam an agent of concrete grouting material plastic shorten. Two plastic shorten the prevention measures of cracks, concrete grouting material has the following several 1, wet ground and abrasive tool, to reduce concrete grouting material moisture loss or evaporate when casting a levite. 2, use appropriate to aggregate wet aggregate water imbibition. 3, the heat environment of concrete grouting material for cooling. Gansu lanzhou high-strength non-shrink grout material 4, in the concrete grouting material appearance using windbreak in order to reduce air flow speed. 5, improving construction technology, to shorten from concrete grouting material mixing, pouring to start maintenance time. 6, give priority to use low exudation rate plus the seam an agent or adopt compensation shorten skills. Concrete grouting material plastic shorten cracks appear in cement early hydration hardening, strengthening maintenance can make the part of the fracture healing; In addition, in the concrete grouting material through secondary vibrating plaster before initial setting, can also be cut or prevent plastic shorten crack.