How to use concrete or high strength mortar grouting repair the damaged concrete members

One, the problem of the nature of the - Asked to repair - This kind of reinforced material, casting concrete must have adequate liquidity and penetrating power, so as to leave no space in concrete, because the grouting is in commonly 10 - Under 12 cm thickness, spread the concrete. When you need in the 4 - 8 cm thick thin layer grouting, which makes the casting of concrete is very difficult, need to have large fluidity and high strength liquid slurry. Also, used for casting concrete or mortar must be effectively bonded to the existing concrete, in order to ensure that made the formation of the integral components of old and new concrete. Second, the annotation for 8 - normal grouting thickness 15 cm filling material is concrete, BEVETOL - SPL or REOTOL - SPL concrete super plasticizer in concrete, liquidity required to ensure that the casting, at the same time by implementing high compression to increase its strength. In the 4 - MEGAGROUT - 8 centimeters thick 100 on the thin layer grouting, the use of high-performance grouting as filling material. It has good fluidity and high strength. Three, application base material ready to dismantle any broken concrete components, and formation of cavity in the old concrete, to improve the bonding to pouring concrete. Expose existing reinforced when necessary. The surface of the existing concrete is mechanical rough ( For example, by sandblasting processing) 。 Then with plenty of water washing of existing concrete under pressure. Preparation form and put new reinforcement tool engineer statics study, with nails and pin is connected to the old tools. As much as possible in the old concrete surface coated with DUREBOND, epoxy resin - Adhesive, so as to ensure the perfect combination between old and new concrete. Normal thickness of 8 - grouting 15 cm in accordance with the above preparations, concrete casting is adding BEVETOL - SPL super plasticizer, under the condition of the ratio of cement weight of 0. 6 - 0. 8%, or REOTOL - SPL super plasticizer. According to the weight ratio of 1, 2 - cement 1. 7%, until about 20 cm concrete slump. In order to better pressure solid concrete, pouring concrete in the process of vibration is indispensable. For 4 - grouting thickness If MEGAGROUT - 8 cm thin layer 100 will be casting molding, it is recommended to use AQUAFIX rapid solidification cement or RAPICRET rapid repair mortar seal between the template juncture, because this material is so flow and fine-grained, otherwise it may be through their escape. The 25 kg bags MEGAGROUT - 100 content added 3 kg water and low speed mixer mixing, until the formation of uniform material. Then add a small amount of up to 0. 5 kg of water until you reach the required liquidity. Mortar is casting, pay attention to avoid the entrained air. Must ensure that the slurry filling the space between the template and the existing structure. Use MEGAGROUT - 100:21. 5 kg/m 2 or 2, 1 kg/cm thick coating to fill the volume of 1 liter. The surface must be exposed to the atmosphere moist for at least 24 hours, method is to use wet linoleum or polyethylene mulch. Four, note during the period of construction of the temperature must be + 5 0 C to + 35 0 C. For pouring concrete strength must be greater than the old concrete strength at least 10 N / 2 mm. For pouring concrete in the particle size of inert materials should not exceed 20 mm. MEGAGROUT - 100 the biggest thickness of each layer of 10 centimeters. Have begun to set the material not water softening. Maintain its liquidity about the product. 60 minutes in 15 temperature 0 ℃ to 25 ℃. At high temperature, it is recommended that the bags will be stored in shady and cool place, and the material is mixed with cold water, so that in a long enough time ( About 60 minutes) Access to appropriate liquidity. At low temperatures, whenever you need a quick development strength, proposed to material mixed with water, and warm by laid insulation plate on the template. The product contains cement, alkaline reaction with water, it is classified as stimuli.