No spark of fine stone concrete formula ratio of dolomite, marble test plan

Not angry not angry of fine stone concrete formula of fine stone concrete misfire manufacturer of fine stone concrete test centered not hair of spark concrete carried out two indexes: one is not spark, 2 it is strength to C20 compressive strength grade. Primitive society man know simulated flight and friction for the fire, into two stones can produce sparks, but only a hard stone can touch a spark. Ordinary concrete coarse aggregate is the chief ingredient in the granite, and by comparing the chemical property of marble and granite, marble hardness is less than a third of the granite, therefore, can be a preliminary judgment, the collision of marble should not spark, and comparing all sorts of chemical composition proportion in granite and marble, it can be seen that decided the main chemical composition is SiO2 rock hardness, and the main components of the sand is SiO2, so, the sand in concrete will cause sparks, in order to verify, according to the concrete coarse. Fine bone display requirements, we will demand manufacturer offers different types of material, open respectively made four types of block were analyzed, Brother night 1) To meet the requirements of construction progress, each type of test blocks are made two, in the run-off axe after seven tested without sparking and strength test, respectively. Misfire test method of fine stone concrete: in a dark room or at night, with 15 cm high emery wheel handheld grinder, equivalent to about iron artifacts from the linear velocity of the ground impact when they hit the 3 m high free fall, the block edges for cutting or grinding, if a spark is unqualified, does not produce sparks is qualified. Compressive strength test, and the common concrete block compression test, use NYL - 2000 type concrete hydraulic pressure testing machine for testing, compare the numerical value. By analyzing the test results, the following conclusions can be ( 1) No spark of fine stone concrete can't sand used as fine aggregate, and can only use marble stone ground to a powder or white clouds for fine aggregate. ( 2) Coarse aggregate can only be used with marble, dolomite, cannot use normal granite rock. So, we are not only satisfy the requirement not spark, and satisfy the requirement of the compressive strength basic class C block on the basis of the aggregate, will be sent to the laboratory for physical properties related to aggregate after inspection is more suitable to readjust the misfire of fine stone concrete mixture ratio, the corresponding material requirements and mixture ratio are shown in table 2, table 3 and table 4.