High strength grouting material shrinkage reason - Quanzhou city in fujian province grouting material manufacturers

High strength grouting material high strength grouting material price high strength grouting material manufacturer even though the details of the mechanism for the high strength grouting material boring shorten, different scholars have different point of view, and yet it is not consistent, completely satisfactory explanation, but jade wall building materials through years of research of hardened cement is a major cause of filtration drying shrinkage analysis, fundamental consistent view is that the wool stoma and gel hole water transpiration loss. That is boring to shorten the wool stoma in the hardened slurry water infused liquid form concave surface formation, the capillary wall caused by the pressure difference between P and P, namely dull shorten, influence of P elements and the correlation between them was Yang - Laplace's equation. Therefore, information about gel dosage, water-binder ratio, fluidity and the environment of the same high strength grouting material, boring shorten depends on liquid surface tension of high strength grouting material wool stoma, the contact Angle between liquid and the capillary wall and capillary radius. Hydration products analysis shows that in silicate glory big high strength grouting material type of cement mixing swell the seam an agent, it is still in the hydration products of Portland cement system, the volume swell because that can lead to swell the number of crystal generate appropriate opportunity and much less, its composition and Portland cement, so swell after stability, cooperation than roughly the same distended small compensation reduce high strength grouting material and the general high strength grouting material porosity is roughly same, its boring to shorten also should be roughly the same, a reflection of the fundamental functions of free deformation experiment data, so in essence, compensation to shorten after hardening, high strength grouting material boring shorten the same as the general high strength grouting material, follow - Yang Laplace equation, the same conditions, the compensation to shorten category of small swell after hardening of high strength grouting material and the general high strength grouting material boring shorten roughly the same. Other, experimental results show, under the constraint condition, when under conditions of high strength grouting material or mortar, its boring to shorten rate is significantly higher than that of tensile condition, under the constraint condition of compensation to shorten high strength grouting material boring to shorten the gap between the cause of the increase is caused by the forward deformation under compressive stress to speed up, this is because, when the specimens of high strength grouting material or mortar compressive stress, the constraint of reinforcement will be in tension, reinforced the tensile stress at the moment can accelerate boring shortening deformation have to carry out, and when the specimen in the stress status of high strength grouting material or mortar are compressive stress to tensile stress, the constraint of reinforced compression, reinforced will prevent the onset of shortening deformation boring at the moment, it's a bit like loss of prestress of prestressed high strength grouting material. High strength grouting material boring period shorten cracking was born suffers from the co-existence of opportunity and its problems, people always look forward to produce a water boring don't attack to shorten the ideal high strength grouting material, and make unremitting efforts to work, however, since the objective properties of porous material, also can't deal with the problem fundamentally, is based on the theory of wool stoma, only some improvement. In terms of Portland cement system now, under the condition of constraint set up in advance enough compressive ability useful compensation later period shorten the stress caused by water loss, this is to avoid high strength grouting material to shorten the cracking is useful, the technical measures of the economy. Many research and engineering practice proved that the small swell of high strength grouting material can shorten fracture rendering time delay high strength grouting material dry, medium or big swell of high strength grouting material can avoid high strength grouting material dry cement base high strength grouting material category crack.