The traditional method for determining the specific dosage of admixtures is usually based on the recommended lower limit of the commonly used dosage by the water reducing agent production plant, taking a certain dosage as the benchmark dosage, and then fluctuating up and down on the basis of the benchmark dosage.
Several concrete specimens with different dosages of admixtures are compared, and the optimal dosage is determined based on the test results.
Generally, for low strength series concrete, the dosage of water reducing agent increases by about 0.
1% for each grade increase, while for high-strength series concrete, the dosage of water reducing agent increases by about 0.
2% for each grade increase.
The method of adding this type of water reducing agent is relatively crude, simply relying on empirical operation without systematic calculation.
Therefore, it is easy to cause improper use of concrete water reducing agents, which can lead to difficult control of concrete slump, poor cohesion, easy bleeding, and pipe blockage during transportation.
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