The silicon-free powder is blended in the non-burning brick making machine. Although the silicon powder can improve the performance of the fresh-mixed and hardened brick making machine, if it is used improperly, it will also cause a quality accident. Therefore, the following matters should be noted in the use:
(1) Since the silicon powder particles are small, the specific surface area is large, and the water demand is high, when the silicon-free powder is incorporated into the brick-free brick machine, it must be used in combination with the high-efficiency water reducing agent to achieve good results.
(2) There are two methods of incorporation of silicon powder into brick making machine: internal mixing method and external mixing method. Since the internal mixing method is to reduce the amount of cement, the method is generally used in medium and low-grade concrete; the external mixing method does not reduce the amount of cement, and is generally used in high-grade concrete.
(3) The amount of silicon powder in the brick making machine should not be too high or too low, and the general dosage is 5%~10%. In this range, the beneficial effect of silicon powder plays the best, that is, not only the role of silicon powder instead of cement Preferably, various excellent properties are fully exerted, and adverse effects can be avoided, such as a reduction in frost resistance of the brick making machine after the amount is more than 15%.
(4) Because the consistency of the silicon powder brick making machine is large, it should be 2~3cm larger than the ordinary concrete when designing the slump of the brick making machine.
(5) The mixing time of the silicon powder brick making machine should be extended by 0.5~1min than that of ordinary concrete, so that the concrete can be more evenly mixed to prevent the silicon powder from forming a mass in the brick making machine and causing quality accidents.
(6) After the brick machine is mixed with silicon powder, it is necessary to strengthen the early curing to prevent plastic shrinkage cracks in the concrete.
The above is the precautions for the operation of the brick-free brick machine. The six major considerations are summarized by the powerful road and bridge manufacturers through years of work experience, and hope to help you.