粗细集料中含泥量过大，造成了混凝土收缩性能的增大。集料颗粒级配不良或者

Clay aggregate thickness is too large, resulting in increased shrinkage of concrete. Aggregate particles or take bad gradation is inappropriate gap grading, likely to cause an increase in shrinkage of concrete, inducing cracks.

The amount of mud in the thick and fine aggregate is too large, which results in the increase of the shrinkage performance of concrete. The poor distribution of aggregate particle level or the adoption of is not appropriate intermittent level matching, easy to cause the increase of concrete shrinkage, induce the emergence of cracks.

Too much mud in coarse and fine aggregate results in the increase of concrete shrinkage. It is easy to increase the shrinkage of concrete and induce cracks if the aggregate particles are poorly graded or the improper discontinuous grading is adopted.<br>