Sandstone and mudstone can be used for ordinary concrete
Hello friends, I work on the logging is actually not too familiar, but distinguish mudstone and siltstone, mudstone is clastic particle size, particle size (with shale almost) <0.005mm, in fact, very good resolution, that basically can not see the gap, and the hardness is very weak, the common natural grain size slightly siltstone; than mudstone, sandstone than small, 0.005-0.05m. We often see muddy siltstone, silty mudstone of the rocks are mainly named after the main rock. Gray sandstone. I hope to help you, good luck to you!
Any rock can be used for concrete. The specification does not specify what rocks cannot be used. However, it is difficult to meet the requirements of some rock, crushing index and compression. In other words, as long as the indicators meet the requirements, what the rock is not much relationship.General sandstone and shale, crushing index value is very low. The compressive strength is about 25% of the hard rock. The actual use is difficult to meet the requirements of. Therefore, the basic can be determined, sandstone and argillaceous rock basically can not be used for concrete aggregates, some sandstone is better, some of the mud, the quality of shale worse.In some complex areas of rock resources, in addition to the use of crushed index control, but also often use the rock compressive strength value requirements, such as the requirements of the compressive strength of the rock can be used.
There is no provision can not, but the actual use of the process is generally not used.Normal concrete generally refers to the ordinary concrete cement as the main cementing material, and water, sand and gravel, if necessary, the incorporation of chemical admixtures and mineral admixtures, mixed in proper proportion, after mixing, compaction and curing and the artificial stone. The concrete is divided into two stages and the state: the plastic state before setting and hardening, namely, the fresh concrete or concrete mixture; the hardened state after hardening. The strength grade of concrete is divided into the standard value of cubic compressive strength. At present, the strength of concrete is divided into 14 grades:
