How to improve the water retention and construction performance of Mortar King! 15

Additives to improve water retention performance: hydroxypropyl methyl cellulose ether, the amount of addition is generally around, depending on the water retention effect you want to do, you can add or subtract the amount, and the choice will not exceed. Don't look at the small amount, it's very easy to use, and the specification can use 100,000 units.

Additives to improve workability: thixotropic lubricants, also in dosage.

A small amount of air-entraining agent can also be added.

I'm an expert at this, so it's really inconvenient to talk about it here.

If you don't reduce costs, it should be said that the fluidity of the mortar should be good.

The workability of the mortar should also be good, is it not blindly with others to ** to make the quality poor.

Added hydroxypropyl methylcellulose ether, viscosity 10-200,000.

The addition of fly ash can improve the water retention of the mortar. Here's why:

In cement-based cementitious materials, the addition of high-quality fly ash is conducive to improving the water retention of the mortar, while the mixing of finely ground slag powder makes the mortar easy to leak water. The mixing of high-quality fly ash can increase the movement resistance of water in the mortar, while the grinding slag powder can reduce the movement resistance of water in the mortar. The addition of water-retaining agent can improve the water-holding performance of freshly mixed mortar.

When using water-retaining agents, attention should be paid to the influence of water-retaining agents on the fluidity of mortars.

Generally speaking, the addition of water-retaining agent will reduce the fluidity of the mortar, and this factor should be fully considered in the design of the mortar mix ratio, and at the same time, the action process of the water-retaining agent on water should also be noted. If the water-retaining agent interacts with water quickly, it has little effect on the stability of the fluidity of the mortar. If the water retention agent interacts with the water slowly, it may affect or reverberate the fluidity stability or cause a loss of fluidity in the mortar.

This is especially important for ready-mixed mortars.

Extended information: Factors affecting the compressive strength of Shangtuan jujube mortarThe compressive strength of commercial mortar mainly depends on the strength of hardened cement stone, therefore, the water-glue ratio is the factor that has the greatest impact on the compressive strength of commercial mortar. The larger the water-glue ratio, the lower the compressive strength of the commercial mortar.

The second is mineral admixtures. Admixture can improve the workability of concrete and mortar mixture, reduce the heat of hydration, improve the compressive strength of mortar and concrete, and inhibit the reaction of alkali aggregate.

The water retention of mortar is mainly evaluated by the degree of delamination, and there is a special equipment for measuring the delamination degree of mortar, and the method of determining the degree of delamination:

Before loading the cement mortar into the layering degree barrel, measure the consistency of the mortar, stand still for a certain time and remove two-thirds of the mortar on the layering degree barrel, and then do the consistency, the consistency difference between the two times is the delamination, too big and too small are not good, too large and poor water retention, too small mortar is easy to crack.

The fluidity of the mortar is determined by a mortar consistency meter, expressed in the degree of immersion (in mm). Mortar with a large degree of immersion, good fluidity. The fluidity of the mortar should be selected according to the type of mortar and masonry, the construction method and the climatic conditions.

Generally speaking, plastering mortar, porous and water-absorbing masonry materials, dry climate and manual mortar should have greater fluidity; And masonry mortar, dense masonry materials, mortars for cold climates and mechanical construction, the fluidity should be less.

The water retention of the mortar is measured by the degree of delamination, and the degree of sinking is measured on the consistency tester with the prepared mortar, after 30min, the mortar with a thickness of 20cm above is removed, and the remaining part of the mortar is re-mixed, and then its degree of immersion is measured, and the difference between the two degrees of sinking before and after (in cm) is the degree of mortar delamination. The large degree of delamination indicates that the water retention of the mortar is not good, and the phenomenon of water segregation is serious. Plastering mortar requires good water retention, and the delamination degree should not be more than 2cm

d。Water retention of mortar - refers to the ability of the freshly mixed mortar to maintain the uniformity of moisture in each layer of mortar during storage, transportation and use, which is measured by the degree of mortar delamination. Mortar delamination - refers to the difference between the consistency of the freshly mixed mortar and the consistency of the lower mortar measured after the static storage of the same batch of mortar for a specified time.

Maintain a certain amount of cementing material and doping, use finer sand, and incorporate air-entraining agent.

Water retention can be improved in the following ways:

1. Maintain a certain amount of cementing materials and doping. In LM3 cement sand paddle, the amount of cement should not be less than 200kg. The total amount of cement and admixtures in cement mixed mortar should be 300? between 350kg.

2. Use finer sand and increase the amount of mixed people.

3. Mixed with air-entraining agent.

Water retention refers to the ability of meat to retain its original moisture and add water when it is subjected to external forces, such as pressurization, chopping, heating, freezing, thawing, pickling and other processing or storage conditions.

In order to improve the water-retaining front cavity of the building mortar, an appropriate amount of () can be added.

a.Water. b.Raw coarse lime.

c.Sand. d.Lime plaster.

Correct answer: d

Summary. The water retention of mortar refers to the ability of mortar to retain water, and mortar with poor water retention is easy to leak water and segregate during transportation and storage, that is, the water floats on it, and the sand and cement sink below, and must be re-stirred before use. In the process of coating, the water is easy to be absorbed by the bricks, so that the mortar is too dry and thick, and the coating is uneven, and at the same time, due to too much water loss of the mortar, it will affect the normal coagulation and hardening of the mortar, and reduce the adhesion between the mortar and the surface.

In the ordinary mortar material, there is also a paste made of gypsum, lime plaster or clay mixed with fibrous reinforcing materials and water, which is called ash, plaster, mud or cement. Commonly used are hemp knife ash (lime paste mixed with hemp knife), paper tendon ash (lime paste mixed with paper tendons), gypsum ash (lime plaster mixed with plaster and paper tendons or glass fiber, etc.) and plaster (a small amount of lime and wheat straw or straw mixed with clay).

The water retention of mortar is not easy to be too high, right or wrong?

The water retention of mortar refers to the ability of mortar to retain water, and mortar with poor water retention is easy to leak water and segregate during transportation and storage, that is, the water floats on it, and the sand and cement sink below, and must be re-stirred before use. In the process of coating, the water is easy to be absorbed by the bricks, so that the mortar is too dry and thick, and the coating is uneven, and at the same time, due to too much water loss of the mortar, it will affect the normal coagulation and hardening of the mortar, and reduce the adhesion between the mortar and the surface. There are also plaster, lime paste or clay mixed with fibrous reinforcing materials and water to prepare a paste, which is called ash, plaster, mud or cement.

Commonly used are hemp knife ash (lime paste mixed with hemp knife), paper gluten ash (lime stuffy paste mixed with paper tendons), gypsum ash (lime plaster and paper tendons or glass fiber mixed in hydrated gypsum) and plaster (a small amount of lime and wheat straw or straw mixed with clay).

The workability of mortar refers to consistency, right or wrong? That's right.

Add a small amount of MC, and if it is caused by segregation, it is estimated that a small amount of water reducer (pumping agent) should be added and the water consumption should be adjusted.

Mortar King is a new type of ultra-concentrated construction mortar admixture, which is a polymer made of a variety of natural materials through scientific processing. Mortar King can improve the physical properties of the mortar, that is, it has good workability, and mainly plays a role in dispersing cement in the mortar, so that the cement and river sand are evenly distributed, so as to achieve no precipitation and no water. Therefore, it can replace all or most of the materials such as lime paste or fly ash.

The mortar mixed by the mortar king has good water retention, and its later strength is greatly improved with the mortar ratio of the same ratio, which can reduce the amount of cement on the basis of ensuring the original design strength standard. Anhui Shanggao Environmental Protection Technology **** has the sale of this product, welcome to buy.