Specifications and models of hollow concrete bricks

1. Introduction

Hollow concrete bricks are a commonly used building material in construction projects. They are lightweight, soundproof, and heat-insulating. They are widely used in residential, public buildings, industrial plants, and other construction fields. This article will provide detailed specifications of hollow concrete bricks in terms of materials, sizes, and strength.

2. Materials

Hollow concrete bricks are mainly made of raw materials such as cement, fine aggregate, coarse aggregate, lime, and sand, and have good strength and fire resistance. Among them, the variety of cement is generally P.O42.5 grade, the particle sizes of fine aggregate and coarse aggregate are 0-5mm and 5-20mm respectively, the proportion of lime is 4%-5%, and the proportion of sand is 40%-50%.

3. Size

Hollow concrete bricks generally have standard sizes and non-standard sizes, among which the standard size is 390mm, 190mm, and 190mm in length, width, and height respectively. Non-standard sizes are customized according to project needs. Common non-standard sizes include 290mm, 190mm, 190mm in length, width and height, and 490mm, 190mm, 190mm in height and other specifications.

4. Strength

The strength of hollow concrete bricks can generally be divided into two types, namely lightweight hollow concrete bricks and ordinary hollow concrete bricks. The volume density of lightweight hollow concrete bricks is below 800kg/m³, and the strength grade is A05-A09, which is suitable for some non-load-bearing buildings. The volume density of ordinary hollow concrete bricks is above 800kg/m³, and the strength grade is A09-A15, which is suitable for buildings such as load-bearing walls.

5. Surface treatment

The surface of hollow concrete bricks can be treated according to different needs. Common surface treatments include grinding, cement brushing, sandblasting and other methods. Among them, grinding can make the surface of the brick smooth, cement brushing can increase the strength of the brick, and sandblasting can make the surface of the brick rough and increase friction.

6. Installation method

The installation methods of hollow concrete bricks are generally wall masonry and wall pasting. Wall masonry is to build bricks according to a certain pattern and fix them with mortar; wall pasting is to directly paste bricks on the wall and fix them with mortar or special adhesive.

7. Scope of use

Hollow concrete bricks are suitable for various construction fields, and common use ranges include residential, public buildings, industrial plants, etc. Its light weight, sound insulation, and thermal insulation characteristics make it particularly suitable for some buildings with high requirements for wall weight and sound insulation, such as high-rise residential buildings, schools, hospitals and other places.

8. Conclusion

Hollow concrete bricks have good light weight, sound insulation, and thermal insulation characteristics, and are a commonly used building material in construction projects. This article provides detailed specifications from the aspects of materials, size, strength, surface treatment, installation method and scope of use, hoping to help with the selection and use of hollow concrete bricks.