冬期负温下施工,砂中含有冰、雪,如用蒸汽加热砂子,内部也会有水分。为保证冬期施工混凝土的水灰比,怎样快速测定砂中的含水率,及时扣除砂中的含水量,严格控制混凝土的水灰比,确保混凝土的设计强度,是施工现场极为重要的工作。为此,我们根据砂子干、湿密度 During the construction of winter under negative temperature, the sand contains ice and snow. If steam is used to heat the sand, there will be moisture inside. In order to ensure the water-cement ratio of concrete during winter construction, how to quickly determine the moisture content in sand, timely deduct the moisture content in sand, strictly control the concrete’s water-cement ratio, and ensure the design strength of concrete is an extremely important work in the construction site. For this purpose, we use dry and wet densities