What is hard cement mortar? How to construct?

Nowadays, various materials are emerging in the construction market, and there may be several kinds of cement for sticking bricks alone. Needless to say, there really is a new type of cement material recently, which is called hard cement mortar. I don't know if you have heard of it. It is mainly used for paving stones or tiles. Today, Bian Xiao will talk to you about what is hard cement mortar? How to construct? I hope I can help you.

First, what is the harsh cement mortar?

1, what is hardened cement mortar? Hard cement mortar is a kind of low slump cement mortar. It is made of sand, water and other materials and is often used as the main raw material for industrial pulping. Let it go at a height of one meter and let it land freely, which is granular and scattered. "Hold the ball in your hand and blossom on the ground", and prepare mortar according to this state. The slump index of hard concrete is expressed by Weibull consistency, and the slump needs to be less than 10mm to reach the standard.

2. Hardened cement mortar This kind of cement has low water content and high hardness, so it is mainly used on walls or floors, which can effectively reduce its collapse. However, in the process of construction, it needs to be prepared in accordance with the prescribed proportion to avoid losing the effect of adhesion.

Second, how to construct hardened cement mortar

1, cleaning the dust at the grass-roots level

First of all, clean up the dust on the grass-roots level, clean it up with a wire brush, remove the mortar skin and ash layer, brush off the oil stains on the grass-roots level with caustic soda water solution, and immediately clean the lye with clear water. We need to measure the elevation of the surface layer according to the horizontal control line of 1.0m on the wall surface, and bounce it onto the wall surface, and then determine the mortar thickness of the surface layer according to the height of the surface layer.

2. Mechanical stirring

The second step, cement mortar is mechanically stirred, the metering ratio of feeding should be correct, and the water addition should be strictly controlled. The mixing time shall not be less than 2 minutes, and the mixing shall be uniform and the color shall be consistent. Before laying cement mortar, a layer of cement slurry should be painted on the surface of the base as the bonding layer, and the water cement ratio is 0.4-0.5. Brush should be uniform, brush and lay.

3, maintenance and acceptance

One-step curing should be carried out after 24 hours of surface calendering, generally when there is no finger print on the surface. When curing, depending on the temperature, the surface should be watered or covered with plastic film to keep moist, and the curing time should be no less than 7 days. Remember to measure the flatness and levelness of the ground during acceptance. If there are quality problems such as hollowing and cracks, remember to mark them so that workers can rectify them in time.

The above is what Bian Xiao shared for you. What is hard cement mortar? How to construct? I hope it helps you.