What is concrete accelerator?
We can know from the name that concrete accelerator is a admixtures added into concrete that can make concrete set and harden rapidly. Homemade concrete accelerator is mainly suitable for shotcrete construction and leakage prevention and plugging of highway, railway, bridge, mine, roadway, tunnel, national defense, water conservancy and other projects, rapid construction of ground concrete and concrete emergency rescue projects. It greatly accelerated the project speed.
The function of concrete accelerator is to accelerate the hydration and hardening of cement and form sufficient strength in a very short time to ensure the requirements of special construction. Then, let’s look into how to use it correctly.
How to use concrete accelerator?
Concrete accelerator is a kind of powdery solid. It accounts for only 2% ~ 3% of the cement in concrete, can make the concrete set initially within 5min and finally within 10min. In order to achieve the purpose of emergency repair or rapid setting of concrete in shaft and roadway. It is an indispensable additive in medium coal shotcrete construction method. Their function is to accelerate the hydration and hardening of cement and form sufficient strength in a very short time to ensure the requirements of special construction.
Mix the sprayed materials evenly according to the proportion of sprayed concrete, and add accelerator randomly during spraying. It is recommended that you select the appropriate dosage and setting time before use.
What should we pay attention to when use concrete accelerator?
Do not add this product when mixing materials, because stones and sands contain a lot of water, the accelerator absorbs water in a short time, decomposes its quick setting components when it is not sprayed, affects the setting time, reduces the concrete strength, and will lead to the adverse effect of sprayed concrete. Before use, trial mix test shall be conducted for the cement varieties used in the project, and the mixing amount shall be selected before large-scale use. Cement that has expired after storage cannot be used, and cement that does not meet national standards cannot be used. The accelerator shall be kept properly to prevent moisture caking and failure. Strengthen early water spraying maintenance to ensure later strength. Strictly control the water cement ratio. The amount of water seepage and leakage must be increased.
Words at the end
Concrete accelerator is an important construction material, almost all the construction projects use it. If you want to know more details about the homemade concrete accelerator, welcome to contact us.