The difference between concrete internal mixing and external mixing, whether the concrete preservati

1. Internal doping is to count the admixture in the cementitious material, and the dosage formula is: a (a+b)*100%, a - the amount of admixture; b - the amount of cementitious material.

2. External doping is not counting the admixture in the cementitious material, and the dosage formula is: a b*100%, a - the amount of admixture; b - the amount of cementitious material.

Internal doping is to count the admixture in the cementitious material, and external doping is not counted.

The calculation of inorganic binders has internal and external doping.

Trapped grip doped, pro. The use of anti-sulfate erosion and preservative for concrete can make concrete have good properties such as anti-salt ion erosion, freeze-thaw cycle damage resistance and high permeability resistance. It is especially suitable for projects that require both anti-corrosion and anti-seepage for concrete buildings.

The incorporation of this product can also reduce the shrinkage value of concrete, which is convenient for large-volume concrete construction. Concrete preservatives are easy to apply and do not require special construction techniques. At the same time, this anti-corrosion method also comprehensively utilizes industrial waste Wang Yuqing - fly ash, which has the significance of green environmental protection.

By adding an appropriate amount of preservatives (replacing part of the cement with fly ash or mineral powder) to ordinary Portland cement, a new cementitious material is made, and the product conforms to the People's Republic of China building materials industry standard JC T1011

Internal blending method, also known as replacing cement method, is to use mineral powder, fly ash, expansion agent and other cementitious materials to replace a certain amount of cement, expansion agent generally replaces cement in equal amounts, and mineral powder and fly ash generally replace cement in excess of cement.

To put it bluntly, it is to accommodate backward technology! Reduce costs.

Admixtures and admixtures in concrete are not original in China, but learn from foreign experience.

Admixtures generally refer to industrial by-products such as fly ash, blast furnace slag, silica fume and other industrial by-products that are more than 5% of the mass of cement and partially replace cement.

Admixtures are doped, and the amount is generally very small, such as water reducers, plasticizers, staple fibers, etc.

Advocate the use of admixtures in concrete, one is to reduce the use of high energy-consuming materials such as cement in construction, the other is the effective use of industrial waste, reduce environmental pressure, and the third is that the admixture itself has the characteristics suitable for some special concrete, such as high strength in the later stage, low heat of hydration, etc.

The application of admixtures is advocated in order to develop high-strength and high-performance concrete and improve the quality of concrete.

1. Internal mixing is to count the rubber powder in the matrix asphalt, and the dosage formula is: a (a+b)*100%, a - the amount of rubber powder; Shibi B - the amount of matrix asphalt is searched for Tanqin.

2. External doping is to not count the rubber powder in the matrix asphalt, and the dosage formula is: a Xinyou B * 100%, a - the amount of rubber powder; b - the amount of matrix asphalt.