concrete is hardened and dried, rainwater and underground water from the outside penetrate into the hardened body through the pores, so that the aqueous solution of hydraulic colloid or inorganic salts flows out, and then reacts with carbon dioxide in the air to form sulfur substances, which are attached to the surface of the hardened body after the water evaporates. This phenomenon is called Baihua, also known as "wall cancer". The appearance of
white bloom will seriously affect the appearance quality of concrete, so corresponding measures should be taken to prevent it in advance.
First of all, use uniform and dense concrete to reduce the pores, then properly reduce the water-cement ratio, reduce the mud content of aggregate, use clean mixing water, high-quality cement, add water reducing agent for proper curing, and at the same time, do a good job of rain-proof measures on the construction site to avoid rainwater intrusion into the concrete, so as to effectively eliminate the occurrence of wall cancer.
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