Concrete is a general designation of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, concrete refers to cement concrete made of cement as cementitious material, sand and stone as aggregate, mixed with water in a certain proportion and mixed. It is widely used in civil engineering. The mixer truck is generally divided according to the square quantity. The square quantity refers to the volume of the tank, not the weight of the concrete. The quality of different concrete installed in the mixing tank is also different, because different concrete densities are different. According to the apparent density, the concrete can be divided into three types: heavy concrete, ordinary concrete and light concrete.

自上料攪拌機(jī)重混凝土是表觀密度大于2500Kg/m3，用特別密實(shí)和特別重的集料制成的，比如重晶石混凝土、鋼屑混凝土等等，他們具有不透X射線和γ射線的作用，像這種大密度的混凝土運(yùn)輸?shù)倪^(guò)程中，駕駛員是要十分注意的，因?yàn)樗拿芏却螅酝瑯尤莘e的攪拌車在裝運(yùn)重混凝土?xí)r，總質(zhì)量就會(huì)增加很多的，車輛的慣性就會(huì)增大很多，因此在車輛的行駛過(guò)程中車速不能過(guò)快，剎車也不能太急，尤其是轉(zhuǎn)彎，一定放慢車速，謹(jǐn)慎駕駛；還有就是因?yàn)槠涿芏却?，在攪拌的時(shí)候就不太容易，對(duì)攪拌車的減速機(jī)也是一個(gè)考驗(yàn)。

Self feeding mixer heavy concrete is made of particularly dense and heavy aggregates with apparent density greater than 2500kg / m3, such as barite concrete, steel chip concrete, etc. they are impermeable to X-rays and γ During the transportation of high-density concrete, the driver should pay great attention to the role of rays. Because of its high density, the total mass of the mixer truck with the same volume will increase a lot when loading heavy concrete, and the inertia of the vehicle will increase a lot. Therefore, the speed of the vehicle can not be too fast, and the braking can not be too fast, especially when turning, Be sure to slow down and drive carefully; In addition, because of its high density, it is not easy to mix, which is also a test for the reducer of the mixer truck.

自上料攪拌機(jī)普通混凝土就是我們?cè)诮ㄖ谐Ｓ玫幕炷?，它的表觀密度在1950-2500Kg/m3之間，集料為砂、石等等，這種混凝土是攪拌車常運(yùn)輸?shù)囊环N，在裝料，卸料按照規(guī)定來(lái)做就行，運(yùn)輸時(shí)間一定不要超過(guò)混凝土凝結(jié)的時(shí)間。

Self loading mixer ordinary concrete is the concrete commonly used in buildings. Its apparent density is between 1950-2500kg / m3, and the aggregate is sand, stone, etc. this kind of concrete is often transported by mixer truck. It can be done according to the regulations during loading and unloading, and the transportation time must not exceed the concrete setting time.

輕質(zhì)混凝土是表觀密度小于1950Kg/m3的混凝土，它又可以分為輕集料混凝土，多孔混凝土，大孔混凝土。這些混凝土的密度相對(duì)較小，裝運(yùn)在攪拌罐內(nèi)，整車的質(zhì)量相對(duì)較輕，駕駛員在駕駛過(guò)程中也就相對(duì)比較輕松。

Lightweight concrete is concrete with apparent density less than 1950kg / m3. It can be divided into lightweight aggregate concrete, porous concrete and macroporous concrete. The density of these concrete is relatively small. When they are transported in the mixing tank, the weight of the whole vehicle is relatively light, and the driver is relatively easy to drive.