Bozhou, Heze grouting material - RCC grouting material performance 
 A: raw material composition 
 , Cement, cement paste RCC grout cementitious materials, but also the RCC of the main factors affecting the performance of the grouting material. Grouting material characteristics of RCC, low heat of hydration, a small contraction, the strength of not less than the the 32.5MPa silicate series of cement is better. Hydraulic dam RCC grouting material mostly selected intensity level is higher than 32.5 ordinary portland cement, moderate heat cement or geothermal cement. 
 2 admixture in the rolling grout, the Haozhou grout material, the Heze grouting compound mixed with the amount of fly ash, due to the morphological effect of fly ash, volcanic ash effects and micro-aggregate effect, improving the RCC grouting material the internal structure, optimizing the performance of the grouting material, the use of excessive replaced by France, on the one hand, fly ash, cement of precipitation of Ca (OH) 2 to produce the pozzolanic reaction, and generate the major product of calcium silicate hydrate gel plug and fill part of the pore; the other hand, the high fineness of fly ash and micro-aggregates fill reaction, and stone grout hole structure (degree of size, pore shape, pore-level distribution, pore rate) and thus significantly improved. 
 Ground slag, the condensate slag, steel slag can be used as admixture in RCC grouting compound 
 3, the aggregate as RCC grouting material, the Haozhou grouting material, Heze grouting materials coarse aggregate of pebbles and gravel, pebbles mixing of small porosity of grout material, roller compacted gravel mixing grout material in the extruder and the discharge process, the hierarchical segregation of the extent and pebbles, grouting material. The shape of the aggregate also affect the performance of the roller compacted grouting material, flat or narrow particles easily lead to concrete porosity increases, and in the vibration of RCC, these particles are easily broken and arranged in a horizontal, causing the mortar ease of filling space. 
 Sand of fineness modulus and particle gradation of the technical performance of the RCC and the project cost has some influence. The general requirements for artificial sand fineness modulus of 2.2 to 2.8, the natural sand of fineness modulus of 2.0 to 3.0. Low fineness modulus of sand, cement binding material relatively more. 
 Admixtures - Admixtures performance of roller compacted grouting material, the Haozhou grouting material, the Heze grouting material of construction performance and hardened properties of all possible, choose the performance of high-performance grouting material admixture. RCC grouting material bleed air is more difficult, In general, the volume of the same argument, the grouting material of RCC than normal amount of air entraining agent increased by 10 times. 
 Second, the concrete mix 
 A water-cement ratio (W / B) W / B, RCC grouting material directly affects the size of the construction properties of the mixture and hardened grouting material properties. Cementitious materials when the W / B increases, the mixture VC value decreases, the strength and durability to reduce grout. For RCC grouting material there RCC, W / B is too large, the water consumption of units of the grouting material, RCC, the grouting material is easy to produce the phenomenon of "spring", but difficult to roller compacted dense. W / B is too small, the RCC RCC is poor, but also easy to RCC dense, so RCC grouting materials, the Haozhou grouting material existence one of the best W / B range. 
 2, the rate of sand - in the rolling filling compound, mixed with a larger proportion of mixed materials (fly ash), not only can save cement, heat release decreases the hydration of the grout to reduce the contraction of grouting material, and can reduce cost, turning waste into treasure. Using fly ash excess cement replacement, part of the fly ash will play with sand, and practical application effect than the same amount to replace the method better. 
 Sand ratio, the size of a direct impact on the compactness of the mixture of the RCC. Sand ratio, the mixture dry and hard, loose, the VX value, ease of roller compacted dense and the porosity of the grout compound, low concrete strength, poor durability. Sand ratio is too small, coarse aggregate separation, reduce the density of concrete, strength and durability decreases. Therefore, we must choose the best sand ratio, to ensure that the grouting material roller compacted and dense. 
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