Why do high and low range bearing grouting material price

Bearing grouting support grouting material price sales of grouting material on the market at present, brand is various, the price is different, quality is uneven. When consumer is buying pedestal grouting material, be sure to polish eyes, choose the price is reasonable, big brand, big factory production quality of grouting material. For example: manager li ( The phone 15838304411) First in terms of standards and pedestal grouting material standards for science and technology base [2005] no. 101 passenger railway bridge pot rubber bearing interim technical conditions. Many companies that offer low with GB/T 50448 - 2008 cement grouting material application technical specifications of super early strength series grouting material to pretend to be. Large factory production support grouting material, cement and aggregate interface transition zone got very big improvement, it is mainly composed of low water/cement ratio, mixed with plus the seam an agent and mineral admixtures. Due to low water-binder ratio to improve the strength and elastic modulus of cement stone, cement and aggregate the gap between the elastic modulus is reduced, making the interface water film thickness decreases, and crystal growth of free space. Cheap bearing grouting material, after the grouting material casting is close-grained, form water film around the inside of the aggregate, especially many bearing grouting material, a large number of bleeding phenomenon, at the bottom of the aggregate of formation water sac. Then generated by cement hydration ettringite and calcium hydroxide crystal, because aggregate surface water/cement ratio is large, so the product crystallization is relatively bulky crystal near the aggregate, to form more than the cement paste or mortar pore structure. There is no guarantee that the pedestal grouting material quality, in the early days, especially within a large number of bleeding occurs, interfacial transition zone volume and size of the pores in bigger than that of the cement paste or mortar ontology. Crystalline compounds such as calcium hydroxide and ettringite, its size and quantity in the interface transition zone is bigger, also cause the grouting material transition zone is lower than the cement slurry in the ontology. Now on the market sales of grouting materials, the brand is various, have different price, quality is uneven. When consumer is buying pedestal grouting material, be sure to polish eyes, choose the price is reasonable, big brand, big factory production quality of grouting material. Large factory production support grouting material, cement and aggregate interface transition zone got very big improvement, this mainly by low water/cement ratio, mixed with plus the seam an agent and mineral admixture. Due to low water-binder ratio to improve the strength and elastic modulus of cement stone, cement and aggregate the gap between the elastic modulus is reduced, making the interface water film thickness decreases, and crystal growth of free space. If you need to purchase pedestal grouting material, you can see to my company, my company production of pedestal grouting material ( www。 godjc。 com) Quality absolutely no problem, you can rest assured use. Welcome your calls.