Cement is an essential material in home decoration. However, there are many types of cement, the most common of which are 325 and 425. So what is 325 cement? What are the differences between 325 cement and 425 cement? Below we will answer the questions one by one for your reference only.

What is 325 cement?

325 cement is just a popular term in the market and does not refer to a specific cement variety. The R in the cement logo means early strength type, such as P.O32.5R, which means early strength ordinary Portland cement with a strength level of 32.5. Ordinary cement strength grades 32.5 and 32.5R have been cancelled. Therefore, the only 325 cements currently available on the market are slag Portland cement, pozzolana Portland cement, fly ash Portland cement, and composite Portland cement. Portland cement and ordinary Portland cement no longer have No. 325.

The difference between 325 cement and 425 cement:

The so-called 325 and 425 mainly refer to the cement strength labels. my country's current cement production mainly includes several grades such as 225#, 325#, 425#, and 525#. The strength of cement mainly refers to the size of the hand per unit area. We know that after cement is mixed with water, it will solidify and become stronger after hardening. In this series of processes, the strength of cement is determined by many factors, including the mineral composition of cement, particle fineness, temperature during hardening, and the proportion of cement and water.

The strength of cement is the main basis for selection during construction or decoration. The so-called strength of 325 is usually lower than that of 425, which is determined by their level.

325 means the compressive strength is 32.5mpa. 325 cement is a popular name, which generally refers to cement with a strength level of 32.5, and does not specifically refer to a specific cement variety. The 28d compressive strength of 325 cement is not less than 32.5MPa. The density of Portland cement and ordinary cement is 3.0-3.15g/cm3

425 refers to the compressive strength of 42.5mpa. 425 Portland cement and ordinary cement are about 3.0-3.3 tons per cubic meter, and fly ash cement is smaller, about 2.7-3.1 tons per cubic meter. Used for advance support grouting of tunnel double side wall guide pit.

Generally divided into ordinary cement Portland cement composite cement. The main difference between 325 and 425 cement is the 28-day compressive strength. 425 has higher strength than 325, which means it has a higher strength level.

The six major cement standards implement strength grades expressed in MPa, such as 32.5, 32.5R, 42.5, 42.5R, etc., so that the value of the strength grade is the same as the lowest value of the 28-day compressive strength index of cement. The new standard also unified the strength levels of cement in my country. Portland cement is divided into 3 strength levels and 6 types, namely 42.5, 42.5R, 52.5, 52.5R, 62.5, and 62.5R. The other five major cements are also divided into 3 grades and 6 types, namely 32.5, 32.5R, 42.5, 42.5R, 52.5, 52.5R.

The above is what the editor brings to you. What is 325 cement? All about the difference between 325 cement and 425 cement.