What is Expanded Cement Mortar? What is the difference between cement mortar and cement mortar?

Expanded cement mortar.

Mortar made of expanded cement, fine aggregate and water, i.e. cement + sand + water, as needed. Expanded cement is made of Portland cement clinker ground together with an appropriate amount of gypsum and expansion agent.

The differences between expanded cement mortar and ordinary cement mortar are as follows:

1. The coagulation performance is different.

When ordinary cement mortar is hardened in the air, the volume will shrink, and the shrinkage will cause micro-cracks in the cement and stone structure, reduce the compactness of the cement and stone structure, and affect the impermeability, frost resistance, and corrosion resistance of the structure.

The volume of expanded cement mortar will not shrink during the hardening process, and it will expand slightly, which can solve the adverse consequences caused by shrinkage;

2. The main uses are different.

Portland expanded cement mortars are suitable for reinforcing structures, pouring machine bases, or consolidating anchor bolts.

It can also be used for joint and repair works. But it is forbidden in the presence of sulfates.

erosion used in water works;

Ordinary Portland cement.

Mortar is mainly used for cast-in-place concrete floor slabs, beams, columns, precast concrete components, and prestressed concrete structures.

High-strength concrete works. Not suitable for temperatures above 250 degrees Celsius.

concrete works;

Expanded cement mortar is to add a certain amount of expansion agent to the cement mortar. It is a functional mortar that is generally plugged to compensate for the shrinkage of cement mortar.

Characteristics of the concrete prepared by expanded cement in the water free expansion rate of 8 10 10-4, can be established in the concrete self-stress, meet the requirements of compensating shrinkage, can reduce or prevent concrete shrinkage cracking. Uses: Mainly used in the manufacture of waterproof mortar and waterproof concrete, suitable for reinforcing structures, pouring machine bases or consolidating anchor bolts, and can be used for joints and repair works.

The impermeability of expanded cement concrete is greater than S30, also known as self-waterproof concrete. The cement is used to prepare self-waterproof concrete, which saves labor and materials, shortens the construction period, and has good durability. The strength of the new expanded cement is high in the early stage, the strength increases greatly in the later stage, and the long-term strength increases steadily.

Concrete prepared with expanded cement has a stronger grip and wrapping force with the steel bar due to the internal expansion self-stress. It does not contain chloride salts and has no rust on steel bars.

Precautions and key points for cement:

Portland expanded cement is mainly used in the manufacture of waterproof mortar and waterproof concrete. It is suitable for reinforcing structures, pouring machine bases or consolidating anchor bolts, and can be used for joint and repair works. However, it is forbidden to use it in water projects with sulfate erosion.

Self-stressing cement is mainly used for self-stressing reinforced concrete pressure pipes and their fittings.

Low-heat micro-expansion cement is mainly used for concrete with low heat of hydration and requiring compensating shrinkage, bulk concrete, and also for projects requiring impermeability and resistance to sulfate erosion. Sulfoaluminate expanded cement is mainly used for pouring component joints and in concrete engineering with impermeability and shrinkage.

Expanded cement can be selected according to your use requirements:

1. Portland expanded cement; It is suitable for reinforcing structures, pouring machine bases or consolidating anchor bolts, and can be used for joint and repair works.

2. Low-heat micro-expansion cement; It is used for concrete that requires a lower heat of hydration and requires compensating shrinkage, bulk concrete, and is also suitable for projects that require impermeability and resistance to sulfate erosion.

3. Sulfoaluminate expanded cement; It is used for pouring component joints and in concrete engineering for impermeability and shrinkage compensation.