Xintai Group will talk about the following precautions in the use of aluminate cement

2022-12-20

　　Xintai Group:Precautions in the use of aluminate cement

　　What is aluminate cement? Calcium aluminate is the main clinker with alumina content of about 50% or more, the hydraulic cementitious material is called aluminate cement, also known as refractory cement, so that aluminate cement and refractory cement is actually the same cement, just called different, do you know what matters need to be noted in the use of aluminate cement? The following Xintai Group Xiaobian will share what you need to pay attention to when using aluminate cement.

　　1. Xintai Group Xiaobian tell you, in the construction process, in order to prevent the aluminate cement setting time out of control, generally do not allow the mixing of silicate cement, lime and other cementitious materials that can precipitate calcium hydroxide, before use, mixing equipment rinsed clean.

　　2. Refractory concrete using aluminate cement, sand and gravel ratio is the same as ordinary cement, when the concrete is in direct contact with the soil, waterproof materials (such as plastic sheeting linoleum, etc.,) should be used for isolation.

　　3. Aluminate cement should be naturally cured within three to six hours after forming, water supply is not allowed, otherwise water will not be hardened by the continuous precipitation of aluminum glue, and at the same time to prevent early water loss caused by carbonation, resulting in concrete surface sulfur pine chalking and internal cracks, which seriously affects the strength of concrete, therefore, after three to six hours of forming, water supply at a temperature of 15-25 for wet curing, when the temperature exceeds 25, should Take cooling measures, the maintenance period of not less than three days, generally do not allow steam curing.

　　4. The mixing volume of concrete should be controlled to be used up within 20 minutes each time, and potable water should be used for mixing, and the PH value should be 70.5. During the mixing period, the hardened concrete should not be used for water supply again, otherwise the concrete may not harden.

　　5. No additives shall be added to aluminate cement without test.

　　6. Xintai Group Xiaobian tells you that when the concrete is used inside the container, the interior of the container is ventilated, and when it is used outdoors, direct sunlight should be avoided, otherwise the concrete strength will be greatly reduced, or even no strength.

　　7. Xintai Group Xiaobian tells you that aluminate cement shall not be used to contact with hardened silicate cement concrete, but can be used to contact with peel strength silicate cement concrete, but the joints should not be in a wet state for a long time, otherwise the concrete will expand and the structure will lose strength.

　　8. Generally speaking, aluminate cement shall not be poured in bulk concrete, the thickness shall not exceed 0.3m, beyond this limit, concrete hardening immediately after the water supply maintenance, and take cooling measures, for reinforced concrete, reinforcement should be coated with combustible layer to reserve expansion joints, reinforced concrete protective layer should not be less than 60mm.

　　9. Xintai Group editorial tells you that in the selection of refractory aggregates and powders, clinker meets the design requirements (chemical composition, particle size distribution, control of harmful substances, etc.,) is selected for batch processing.

　　Well, XINTAI Group Xiaobian will speak here first, thank you for watching, we will see you next time.

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Xintai Group will talk about the following precautions in the use of aluminate cement

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