Method and apparatus for testing ready-mixed concrete.
摘要
<p>Concrete with a known cement mixing ratio is sampled and the aggregate is screened out. A fixed quantity of the resulting mortar is weighed, stirred with water and allowed to stand. The mortar sample is then immersed in water and again weighed. A linear relationship between the water-to-cement ratio of the concrete and the ratio of the weight of the mortar under water to that out of water then allows the water-to-cement ratio w/c to be read off from a graph. This then serves as a measure of the quality of the hardened concrete.
<??>An apparatus for carrying out the method automatically is also described. </p>
