What is the difference between concrete and cement mortar?

There are four main differences between concrete and cement mortar. Here is a detailed introduction to the difference between the two.

Make a difference

Cement mortar is a mixture of cement, water and sand in a certain proportion. Cement concrete is a mixture of cement, water, sand and stones according to the required mixture ratio.

Different uses

Cement mortar can be used to build thin block materials to build vertical load-bearing members or enclosure members of walls, but concrete can't; Concrete can be poured into vertical load-bearing members according to its own number, or into beams or members of various shapes. Cement concrete cannot.

be different in nature

Cement mortar can't resist external load by its own strength, but is composed of itself and masonry blocks, and its bearing capacity is small; Concrete itself can provide great compressive bearing capacity.

Different prices

Mortar with slightly larger volume has large shrinkage, insufficient volume stability and low compressive bearing capacity; Due to the addition of appropriate stones (inert materials), mass concrete has stable volume and high strength, and the price of concrete is cheap at the same volume.

Extended data

Characteristics of cement mortar

1. Cement mortar is a mixture of cement and sand in a certain proportion, which can be used to prepare high-strength mortar. Cement mortar is generally used for foundations, basements soaked in water for a long time and masonry subjected to large external forces. Mainly used in wet parts (such as foundation, pool, etc.). ). Key points of cement mortar plastering construction Standard ash cake must be prepared before plastering.

2. There is also a kind of non-ignition mortar (explosion-proof, friction-proof and ignition-proof), which consists of dolomite, quartz sand, special additives and special cement. This product has the characteristics of incombustibility, high wear resistance, impact resistance, moisture resistance, strong decoration, no dust, easy construction, and no sparks in case of impact or friction.

3, cement mortar in use, but also often mixed with some additives such as waterproof agent, early strength agent, micro foaming agent, waterproof powder and so on. In order to improve its workability and consistency. ) During the solidification of cement mortar, part of water reacts with cement to form colloid. Cement mortar with the ratio of 1: 3 is generally composed of 1 cement and 3 sand, but the ratio of water is ignored. The specific gravity of water is generally around 0.6, so the correct ratio is 1: 3: 0.6, and its density is 20. The other part of the water evaporates and the volume decreases, resulting in shrinkage cracks on the ground.

References:

Baidu encyclopedia-building construction