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First, special Wear-resistant castable is a new type of inorganic composite building material. It has the characteristics of simple construction, erosion resistance, high temperature resistance, thermal shock resistance, good group resistance, easy to make up, etc., and the unit price is cheap and convenient to carry.
Second, the basic performanceCompressive strength ≥ 70MPa
Modulus of elasticity ≥4.0× 104MPa
Wear amount ≤ 1kg/m2
Temperature resistance function ≤ 600 ° C
Parameter ≤0.015
Thickness & ge; 40 ~ 50mm
Third, function and usage
Scope of use
Used in slag ditch, mine trough and other wear-resistant layers with wear resistance requirements
1. Construction facilities and tools
Forced cement agitator, plate vibrator, sander.
2, construction preparation
1 cement base treatment
A. Clear the basic surface layer, there must be no debris such as gravel and floating pulp. The basic level should not be used if there are loose parts.
B. Vertical or inclined concrete is basically placed on plum blossom nails (with 6 ~ 8mm steel bars, width 30mm, shape y type, plum blossom nail spacing 250mm).
C. The construction surface should be fully wetted for 2 hours.
2 steel base treatment
A. Derusting the steel surface, removing oil and other debris.
B. Place the plum nail (the method is the same as above).
3 The mixer should be as close as possible to the construction coordinates, which is conducive to the continuous development of the construction. The agitation water should be clean water, and the use of sewage, waste water and water containing impurities is prohibited.
3, stirring
1 Pour the wear-resistant castable into the mixer, start the mixer, and stir for 1 minute.
2 Pour the weighed water (water consumption from 7% to 9%) into the blender and stir for another 2 to 3 minutes. When using a self-dumping mixer, the mixing time should be extended moderately. The tank slump should be kept between 3± 1mm.
4. Construction
1 Before the start of construction, the residual moisture of the surface layer should be removed, and the yx cement interface treatment agent should be brushed on the basic surface layer with a brush. The pouring should be carried out immediately before it is dried.
2 Pour the wear-resistant castable into the template and use the vibrator to shock it. The vibrating for a while should be based on the surface of the wear-resistant castable. If the casting layer is thin and it is not convenient to use the vibrator to vibrate, the squeezing method can be used, but the construction should pay attention to tapping and compaction until the cortex is re-slurry, and finally calendering is carried out.
3 operable time: from the mixing of water to the completion of pouring, the early-strength wear-resistant castable should be operated within half an hour during the construction operation, and the operation of the conventional wear-resistant castable should be operated for one hour. It is advisable to do it with stirring, with pouring, and with vibration.
4 Maintenance: After the final casting of the castable, it should be wet and maintained. The curing method and curing time can be carried out according to the requirements of reinforced concrete construction.
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