Prestressed pipe pressure slurry and grouting seam an agent which is good

Prestressed pipe pressure slurry pipe grouting method of post-tensioned prestressed concrete members is the construction of one of the key working procedure, its quality directly affects the safety and durability of prestressed concrete structure. Therefore, the technical specification for construction of highway bridge ( JTG/T F50- 2011). Pipe grouting quality requests is very severe. Pressure slurry function and safe sex have a great impact on the quality of prestressed pipe grouting. Now, the prestressed pipe grouting material used by grouting is divided into special pressure slurry and ( + cement grouting the seam an agent) Two kinds. Prestressed pipe special pressure slurry for duct grouting of good quality, high cost performance, guess the special prestressed pipe grouting materials occupy larger market share. In the traditional slurry blending grouting the seam an agent, prestressed pipe grouting quality is difficult to ensure, serious doubt exists, the pipe grouting for prestressed bridge of doubt was removing happen again and again, make grouting beautiful seam an agent market share decrease year by year. The above difference is: a fruit pulp chamber of commerce, the quality control of prestressed pipe pressure to choose excellent cement quality function, and alkali content of cement, sulfur content, C3A and mixed material requests severely. After a batch purchase and secondary homogenization, useful to ensure the stability of cement. Combined with special functions of high water reducing the seam an agent, high swell the seam an agent, defoaming seam an agent, the rust resistance seam an agent and mineral admixture, mixture slurry stability, good liquidity, no bleeding, micro swell, high durability and good construction season environment adaptability after tensioning prestressed concrete pipe grouting materials for special purpose, quality high reliability. Grouting beauty seam an agent and the compatibility of cement undoubtedly affect slurry of safe sex, and then the pipe grouting quality is not controlled. The chemical composition of cement, mineral composition, grain size distribution and varieties of admixture and its quantity, freshness, etc will affect the compatibility of cement and grouting the seam an agent. Construction of the duct grouting construction period is longer, need to be repeated to buy cement, plus keep wrong on the construction site, cement agglomerate, cement quality shake is bigger, grouting the seam an agent, poor compatibility with cement and that (1) slurry quality safe sex is bad, low liquidity, liquidity lost faster, volume is not safe; (2) new mix slurry exudation rate, easy to segregation stratification, pipe grouting into full condition; (3) after hardening grout imperfect, clearing, pipe grouting is difficult to ensure quality. Obviously, in comparison, the prestressed pipe special pressure slurry pipe grouting quality controllability is superior to the traditional grouting seam an agent. Second, cost and quality of prestressed pipe pressure ratio of pulp yield, through bulk purchase in accordance with piping pressure slurry quality request of various original materials, constantly improve the technical level, optimizing the production process, on the premise of ensuring quality, decreased production cost, or the cost of using smaller further improve pulp quality, the prestressed pipe pressure slurry with high cost performance. Because grouting the seam an agent and cement compatibility questions, grouting the seam an agent from the manufacturer if want to ensure the quality of pipe grouting, requires pipe grouting by using cement continuously allocate a good compatibility with excellent grouting seam an agent. Cement quality a shake, grouting the seam an agent have to be adjusted. A single output low, the price is expensive, the price is low. And because the repeated adjustment, also not easy to ensure the quality of pipe grouting. Pipe grouting quality highway Bridges post-tensioned method directly on safety and durability of prestressed concrete structure. Because of the particularity of shade engineering, pipe grouting quality check and supervision to useful. In order to ensure the quality of the prestressed pipe grouting, should first ensure that the quality of the prestressed pipe grouting material. Therefore, in the quality control is preferred, high cost and quality cost performance under the guidelines of prestressed pipe grouting material should first choose special prestressed pipe pressure slurry.