Relationship Between Aggregate and Concrete Strength

In the past, the main use of plastic strength of concrete strength of gravel will indeed affect the concrete in different degrees; at the end of the 1950s in China have component factory used dry hard concrete, water cement ratio is low, less slurry concentration, mixture not slump Mobile Electric Concrete Mixer, V-B consistometer test, the degree of work for more than 20 seconds, can only be used for prefabricated, in the high frequency vibration table compression strength vibration tamping, high labor intensity of workers, deafening noise, and consume a lot of energy and soon stopped production. The strength of the concrete depends on the strength of the rock and the strength of the mortar and the interface between the mortar and the stone. At that time, the general use of low plastic concrete slump 10 mm to 30 mm) and plastic concrete slump 30 mm to 50 mm, 50 mm ~ 70mm, 90 mm ~ 90mm); at the beginning of the last century began to use flowing concrete slump 100mm above; effect of gravel on the strength of concrete with bone paste ratio increases decreases. In the pumping mixing coagulation (slump is over 150 mm, the current is generally more than 200mm), stones in the concrete was suspended state, the strength of the concrete basically has nothing to do with the strength of aggregate. Now with the particles of very low intensity light aggregate (Tao Li) has been prepared with high strength (C50) of pump concrete is proof. In modern concrete, sand and gravel in the role of concrete is not the main strength, but it is not a key role.Henan Daswell Machinery Co., Ltd,is a professional manufacturer and trader specializing in the research, development and production of construction machinery for nearly 30 years. Our main products are as follows:Ready-mixed concrete batching plants,concrete batching plants,concrete mixer,blocking making machine,concrete pump,etc. However, when the water cement ratio is certain, the amount of sand and the grain size influence the...