News information

Concrete admixture use error detailed analysis!

Release time:

2022-09-23

Source:

The use of concrete admixture greatly improves the fluidity of concrete and reduces the amount of cementitious materials in concrete. Therefore, concrete external additives have been widely used. In the long-term production practice, we found that many mixing stationsExternal AdditiveThere are errors in the use of concrete, resulting in insufficient concrete strength, poor workability, or high cost of concrete mix. Mastering the correct use of concrete admixture can reduce the cost of mix proportion on the premise of keeping the strength of concrete unchanged, improve the strength of concrete on the premise of keeping the cost of mix proportion unchanged, and improve the workability of concrete on the premise of keeping the water-binder ratio unchanged.

At present, it is difficult to improve the concrete strength of many mixing plants. If you want to improve the strength of concrete, you are in a cruel market competition environment, and you are faced with the confusion of whether to increase costs and reduce profits. Through in-depth investigation and analysis, it is found that most of these mixing stations have entered the misunderstanding of the use of concrete admixtures, as follows:

1. Buy at a low priceExternal Additive. Due to the fierce market competition, the mixing station has strict control over the purchase of raw materials. Mixing plants want to purchase raw materials at low prices, concreteExternal AdditiveSo it is. Lower mixing stationExternal Additivepurchase price, which necessarily leadsExternal AdditiveThe reduction of the quality level of the production enterprise. 2-RestrictionsExternal AdditiveThe amount. The mixing plant decision-making level strictly monitors the mix ratio cost, even for cement and.External AdditiveThere are clear requirements for the amount. This inevitably leads to the technical department not daring to break through the decision-making level when designing the matching ratio.External AdditiveDosage requirements. 3-LackExternal AdditiveQuality monitoring and trial matching verification. At present, most of the mixing stationExternal AdditiveThe storage inspection, the solid content of the net slurry, water reduction rate, density, fluidity and other technical indicators of 1 to 2 tests, few mixing stations for concrete tests. In production practice, we find that evenExternal AdditiveThe solid content, water reduction rate, density, net slurry fluidity and other technical indicators meet the requirements, the concrete test may still not reach the original trial mixing effect, that is, the concrete water reduction rate is insufficient or poor adaptability.

Mixing plant using concrete admixture error, is due toExternal Additivelack of understanding of the mechanism and basic functions, as well as the effect of water-binder ratio on concrete strength. To correct the mixing station onExternal AdditiveMistakes in use should be systematically controlled from the aspects of testing, procurement, acceptance, use, daily inspection, trial matching, verification, etc. Among them, the key to ensure the strength of concrete is to control the actual water consumption in production and ensure that the water-binder ratio is not greater than the design value. WhenExternal AdditiveWhen the quality level is low, in order to achieve the desired water reduction effect, it must be increased.External AdditiveThe amount of doping. Practice has proved that the procurement and use of low doping high standardsExternal Additivein concrete strength assurance andAdditivesIn terms of unilateral cost control, it is better than the low standard of high doping.External Additive.