Calculation of cement per cube of concrete

Instructions for use of plasticizer S-3

Before you start preparing the concrete mixture, read the instructions on the packaging and make all the necessary calculations to know how much water to use for a given amount of cement, since you cannot add water and improvers to the ready-made mixture.
The cooking procedure is as follows:

1. Dilute liquid plasticizer C-3 and other additives in water and pour the solution into a running concrete mixer.
2. Load half the cement into the concrete mixer.
3. Load in coarse filler.
4. Add the rest of the cement.
5. Add sand.

Interesting!

In winter, hot (up to 70° C) water is used, and the components of the mixture must be added in a different order: water, crushed stone, cement, sand.

When using a dry additive, you will have to first dilute a 35% aqueous solution.

Advice!

How to dilute plasticizer S-3? Simplified instructions - for one part dry matter, two parts water by weight. Mix the additive with warm water and leave for several hours until the solution is homogeneous.

Plasticizer S-3 for paving slabs - detailed instructions

Paving slabs are exposed to aggressive influence of unfavorable factors (temperature changes, moisture, insolation, mechanical stress), which accelerates their wear. The use of a plasticizer will help extend the service life of tiles and improve their performance.

Plasticizer S-3 is a complex additive obtained from organic cellulose compounds that improves the structure of the concrete mixture and reduces the cost of producing road tiles.

You can buy plasticizer S-3 in the online store Dorozhki.com.ua, at the price from the manufacturer, by clicking on this link.

Compatible with a variety of fillers and additives, it comes in two forms:

• dry beige-brown powder, which is used after dissolving in water (optimal concentration 15-35%);
• concentrated solution - a dense, viscous, coffee-colored liquid with a concentration of 30–36%.

Plasticizer S-3: what does using the additive provide?

• obtaining highly flexible and high-strength concrete mixtures;
• increase in strength (by 25-40%), frost resistance (by 1-1.5 grades) and water permeability (by 3-4 grades) of concrete;
• high hardening speed under normal conditions;
• reduction in cement consumption by 15-25%;
• reduction in water demand by 30%, due to increased hygroscopicity of concrete;
• extension of the period of use of the working staff from 1 to 1.5 hours;
• imparting anti-corrosion properties to metal fittings;
• better adhesion of concrete to reinforcing mesh;
• homogeneity of the batch;
• reducing the protrusion of salt on the surface of the product.

Preparation of a solution with liquid concentrate C-3

• It is recommended to mix the plasticizer concentrate well in the original packaging.
• The additive is dosed at the rate of 1–2 liters per 100 kg of binder.
• The plasticizer is dissolved in a small amount of water.
• The resulting solution is periodically poured into a running concrete mixer.
• The calculated amount of cement and solid aggregates is sent to a concrete mixer and mixed until a homogeneous mass is obtained. With an increase in the amount of plasticizer in the working mixture, it will take more time for the concrete mass to harden.

Preparation of a solution based on dry plasticizer S-3

1. The plasticizer is diluted in warm water (25-30C) one hour before introduction into the main solution. The optimal dose of C-3 is about 0.5-0.8% by weight of cement (500-800g of additive per 100 kg of cement in terms of dry matter).
2. First, mix the dry mixture. The plasticizer is introduced into the finished solution in liquid form because the resulting mixture immediately begins to work.
3. Prepare the usual concrete composition: a bucket of cement and 2 buckets of filler. Place the dry mixture in a concrete mixer and mix dry first. Constantly stirring the cement mixture, add a diluted plasticizer solution (1 liter of C-3 solution and 4 liters of water). To improve the characteristics of concrete at this stage, you can add fiberglass - 2 large handfuls. The resulting batch should have a heavy and loose consistency, be thoroughly mixed - homogeneous, without lumps.

Advice. For convenience, you can use the dosage suggested by the manufacturer (see packaging): add two parts of water to one part of the powder.

• According to the instructions on the package, to obtain 1 kg of 35% solution you will need 366 g of dry additive and 634 g of water.
• Quantity calculation:

If the required amount of C-3 is 0.5% in terms of absolutely dry substance (0.5 kg per 100 kg of cement), then the consumption of a 35% solution will be as follows: 0.5 * 100/35 = 1.43 kg. In liters this will be: 1.43/1.192=1.2 liters per 100 kg of cement (1.192 is the density of a 35% plasticizer solution).

What are the benefits of paving slabs:

• increasing the number of freeze-thaw cycles that tiles can withstand without damage;
• increasing strength and durability;
• protection against concrete sticking to the mold during the casting stage;
• reducing the risk of pigment leaching;
• reduction of shrinkage, reduction of shrinkage cracks, porosity;
• smooth tile surface, for any geometry of casting molds;
• environmental friendliness.

Work safety requirements

Plasticizer S-3 is a moderately hazardous substance (hazard class 3).

Work must be carried out in a well-ventilated area, excluding contact with open fire, using personal protective equipment.

The use of a plasticizer is advisable both in order to save costs and time, and to obtain high-quality concrete with specified and predictable characteristics.

Source: https://www.rbc.ua/rus/digests/plastifikator-s-3-trotuarnoy-plitki-podrobnaya-1469451589.html

Subtleties of using plasticizer S-3

The additive belongs to the third hazard class and does not require special precautions during transportation and storage.

Attention!

During work, the use of protective equipment is required: gloves, a respirator, safety glasses and overalls.

Plasticizer S-3 can be combined with other additives to obtain concrete that acquires certain desired qualities:

1. with a strength accelerator for the production of paving slabs;
2. with alkaline additives to produce cellular concrete;
3. with air-entraining additives for the preparation of insulating concrete;
4. with antifreeze additives during construction work at low temperatures.

Plasticizer grades S-3

One of the brightest representatives of this impregnation for concrete is the Cemmix Cemplast brand plasticizer. This is a universal additive that is used in all types of cement and concrete mortars. In this case, the end result is mixtures without drainage and separation.

Here are just a few types of concrete products to which the TsemPlast plasticizer can be added. This is to the question, what is it for:

• ready-mixed concrete;
• reinforced concrete products;
• cement plasters;
• for cement mortar on porous fillers;
• cinder blocks and paving slabs;
• thick screeds, self-leveling floors, screeds for heated floors.

Consumer reviews indicate that the brand of this plasticizer is one of the best. Because the market is flooded with Chinese products in bags.

Where is it used?

Plasticizing additive is widely used in the manufacture of:

1. monolithic structures of high strength;
2. reinforced concrete structures of complex shapes and pipes;
3. reinforced load-bearing structures;
4. monolithic panels and slabs in civil engineering;
5. foundations;
6. floors, screeds;
7. paving slabs

and during plastering work.

Wherever it is necessary to increase the workability of the mixture without loss of strength and where it is necessary to transport and store the concrete solution.

Instructions for mixing a solution with a plasticizer

The main condition for obtaining a solution with the required qualities is to strictly follow the dosage of the plasticizer in the mixture. It is also important to follow the sequence of adding additives.

Detergents and washing powder are added in diluted form at the stage of preparing the cement-sand mixture. Slaked lime is mixed with dry fractions and only after obtaining a homogeneous mixture is water added. Polyvinyl acetate is diluted with water and added to the ready-made mixture.

For plasticizers produced in factories, the instructions for use should be followed.

Advantages and disadvantages of S-3

Pros of the supplement:

1. increases the mobility of the concrete mixture up to P5, while simultaneously increasing the strength of the concrete stone up to 40%;
2. allows you to obtain flowing self-compacting concrete, waterproof anti-corrosion concrete;
3. makes it possible to produce dense products with a perfectly smooth surface;
4. allows transportation of the mixture for a long time without loss of concrete quality;
5. reduces cement consumption by up to 14%;
6. reduces water consumption;
7. makes it possible to do without vibration compaction and save energy;
8. strengthens reinforced concrete structures due to good adhesion to reinforcement;
9. minimizes shrinkage, helps avoid cracks;
10. combined with other additives, allowing you to obtain concrete with a set of necessary qualities.

Minuses:

1. May cause dermatitis, eczema and allergic reactions upon contact with skin, and therefore requires the use of protective equipment.
2. NOT recommended for use in structures reinforced with metal reinforcement.

Plasticizers for concrete - instructions for use

General instructions for the use of modifying substances provide for the introduction of liquid and dry components. The dosage is regulated by the manufacturer.

The amount of additives introduced is determined by a number of factors:

• purpose of the concrete mixture;
• Portland cement size;
• concentration of minerals in cement.

The manufacturer recommends adding the additive in an amount of about a percentage of the weight of cement. The optimal concentration is determined experimentally.

This additive is added to the cement-sand composition in a liquid state.

How to replace C-3 at home?

When making your own concrete mortar at home, you are often tempted to save on industrially produced additives and make do with recipes that can be found in handicraft manuals.

Since most plasticizers are made on the basis of surfactants, people realize that they can be replaced with detergents that also contain surfactants.

Washing powders, dishwashing detergents, inexpensive types of liquid soap and shampoos and other available materials are used.

To increase the mobility and plasticity of the mixture, it is recommended to add 0.25-0.40% detergent from the volume of dry cement, while simultaneously slightly reducing the water-cement ratio. The detergent must first be diluted in water.

When using such advice, you need to understand that all surfactants have different characteristics. In products for household use and personal hygiene, the types of surfactants that are included in plasticizing additives are not used. Therefore, although the concrete solution becomes more plastic than a mixture without additives, it loses to a solution with the addition of a plasticizer in many respects.

Another important point: it is not always possible to find out what the dosage of surfactants is in each specific detergent; accordingly, it will not be possible to accurately measure and dilute a homemade additive. You will have to experiment to find out how much to add. And excessive addition of surfactants leads to a decrease in the strength of the finished concrete.

Disadvantages of detergent as a plasticizing additive in concrete compared to plasticizer S-3:

1. Impossibility of precise dosage of surfactants.
2. Less mobility of concrete compared to a solution to which a plasticizer is added. In fact, the solution is liquefied and saturated with small air bubbles, while the plasticizer envelops the particles of cement and filler, allowing them to more easily slide relative to each other.
3. The surfactants in detergents are different in chemical composition and action, so the result of their use is not predictable.
4. As a result of the use of detergents, air bubbles form in the mixture, and the finished concrete becomes more porous and lighter (the difference in mass between standard concrete and concrete with the addition of detergent can reach 30%).
5. Due to the decrease in density, the strength of concrete decreases.
6. Porous concrete, resulting from the addition of detergents, absorbs moisture more actively, which can lead to mold, cracks and rapid destruction of concrete.

In this regard, homemade additives should not be trusted too much. Their use can be justified when independently manufacturing structures of low importance.

Video: Fairy plus concrete. How does adding a plasticizer or Fairy affect the properties of concrete?

In the case of serious construction, it is advisable to buy industrially produced additives. They are available for sale in construction stores, they are easy to purchase, they do not increase the cost of concrete or increase it only slightly, are provided with instructions for use and dosage, and guarantee the desired result.

The Plastix plasticizer has proven itself as a reliable complex additive that allows you to save cement and obtain a concrete mixture with increased workability and high-strength concrete products. Plastix saves you time and money.

Plasticizer S-3

Highly effective superplasticizer for concrete and mortar mixtures with a wide spectrum of action. One of the first domestic concrete plasticizers based on condensation products of naphthalene sulfonic acid and formaldehyde, with molecular weight distribution.

Application area

Plasticizer S-3 is recommended for use in the construction of all types of structures made of monolithic heavy concrete of compressive strength classes B15 and higher; in the manufacture of all types of prefabricated reinforced concrete structures and concrete products from heavy concrete; during the construction of all types of structures from monolithic fine-grained concrete of strength classes B10 (M150) and higher; in the manufacture of all types of prefabricated reinforced concrete structures and concrete products using porous aggregates of compressive strength classes B 7.5 (M100) and higher; if it is necessary to produce concrete mixtures using non-standard aggregates, including fine sands; when constructing monolithic structures using prestressing cement or using mineral expansion additives; during the construction of monolithic structures, the production of prefabricated reinforced concrete products from heat-resistant concrete using Portland cement, Portland slag cement and aluminous cement.

Features and Benefits

The use of highly effective Superplasticizer S-3 in the technology of producing concrete mixtures ensures:

1. According to rheological properties:
   obtaining highly flexible and cast concrete mixtures (P4, P5), laid without vibration;
2. improving the workability, cohesion and homogeneity of concrete mixtures;
3. obtaining a water-reducing effect in concrete mixtures (up to 25% reduction in water consumption); increasing the persistence (viability) of concrete mixtures by 1 - 1.5 hours.
4. According to physical and mechanical indicators:
   increase in the strength characteristics of concrete on ordinary materials by 15% or more;
5. due to the water-reducing effect, an increase in the strength indicators of concrete by 30 - 40%;
6. obtaining concrete with high levels of water resistance W = 10 or more, frost resistance F = 300 or more, and corrosion resistance;
7. 1.5 - 1.6 times improvement in the adhesion of concrete to embedded reinforcement;
8. According to technical and economic indicators:

• saving binder (cement) in concrete mixtures by 15 - 20% without reducing the strength of concrete;
• replacing PC - 500 with PC -400;
• reduction of energy costs during heat and humidity treatment of concrete;
• reduction of labor costs by 2 - 3 times (at W/C = const) when laying concrete mixtures; reduction in isothermal heating temperature by 10 - 15°C (at W/C = const)
• improving the quality of the surface of products, as well as preventing the formation of efflorescence.

Recommendations for use

To prepare concrete with concrete plasticizer S-3, materials that comply with GOST standards must be used. Selecting the composition of concrete with an additive involves adjusting the working composition of concrete without an additive. Superplasticizer S-3 is introduced into the concrete mixture along with water for mixing in the form of an aqueous solution of working concentration. The working concentration of the solution used is selected by the consumer based on the requirements of the technology, conditions of use and ease of use. The greatest liquefying effect of a concrete mixture is observed when a concrete plasticizer is introduced with the second part of mixing water. The mixing time and conditions are also selected by the consumer based on the technology conditions. The effectiveness of Superplasticizer S-3 directly depends on the mineral composition of cement and aggregates.

Dosage

The dosage of concrete plasticizer S-3 depends on the purpose of the concrete mixture, the content of tricalcium aluminate in the cement, active mineral additives and the dispersion of cement. The recommended dosage is 0.4 - 1% by weight of the binder in terms of dry matter. The optimal dosage is determined experimentally on the materials used.

Compatibility

Superplasticizer S-3 is compatible with all types of additives produced by COMPONENT LLC. Combination with other types of additives that have a distinctive base must be agreed with the manufacturer.

Package

Plasticizer S-3 is available in the form of an aqueous solution and dry powder. In the form of an aqueous solution, it is poured into railway tanks, tank trucks, plastic containers or dispensed into buyer containers. In the form of a dry powder, it is packaged in polypropylene fabric bags with a polyethylene liner.

Best before date

The guaranteed shelf life of the plasticizer is 1 year from the date of manufacture. After the warranty period expires, the product must be tested according to all standardized quality indicators and, if it meets the requirements of the current specifications, can be used in production.

Storage conditions

The product Superplasticizer S-3 should be stored in containers protected from precipitation at positive temperatures (from t = + 15°C). In case of accidental freezing, the product does not lose its quality characteristics; the solution will need to be thoroughly mixed with simultaneous heating and bubbling. It is recommended to store the dry product in heated, ventilated, closed and dry warehouses on pallets.

Precautionary measures

Plasticizer S-3 is a moderately hazardous substance and belongs to hazard class 3. During storage it does not emit harmful substances or vapors. The product may have an irritating effect on the mucous membranes of the visual and respiratory organs and unprotected skin, therefore, when working with it, it is recommended to use personal protective equipment in accordance with GOST 12.4.103 and GOST 12.4.011.