Formwork grease is often usedwhen working with reinforced concrete structures. It allows you to reduce the adhesion of concrete with formwork, when there is a need to produce a formwork. Such compositions have another purpose. It is the extension of the life of the elements of the formwork. After all, if they are removed with some effort, when the materials are firmly fastened together, then the shields can be damaged, and their wear will occur ahead of time.
The quality characteristics of lubricants
Formwork lubricant is not considered a qualityall cases. In addition to performing its main function, the composition should not yet leave oily stains on the concrete surface. The exception is the creation of structures that later have to be filled with soil. The same applies to cases where the surface of concrete is required to be covered with a lining or a waterproofing layer. In addition, lubricants should not reduce the strength of the contact layer design. The composition is necessarily made refractory. Among the requirements for formwork oils, we can distinguish the absence of substances that would be harmful to health. Important and ease of application. So, the tool should keep well on a vertical surface for a day at a temperature of + 30 degrees Celsius.
Varieties
If you need a lubricant for formwork, then beforethe beginning of the work it is important to determine what purpose should have a composition. All means used for work with formwork can be divided into four groups, namely: aqueous suspensions; combined lubricants; water-repellent compositions; as well as lubricants that slow down the beginning of the freezing of the solution.
Aqueous suspensions are inert toconcrete compositions that are inexpensive, but not always effective. If vibrocompaction is used in the course of work, the lubricants described are rubbed off with a solution and contaminate the surface of the future structure. This explains the fact that they are rarely used in monolithic construction.
Grease for formwork hydrophobic actionquite common in monolithic construction, but it has a number of disadvantages. The first of them is expressed in considerable value, the second - in the ability to pollute the surface of the structure, and the third - in flammability under direct exposure to fire.
Setting Agents and Combination Products
If you decide to use as a lubricantretarder setting, it is worth considering that such compositions have a drawback, which is the difficulty of adjusting the thickness of the mortar layer. The most common compounds today are due to the high efficiency of the mixtures. Among their ingredients there can be not only retarding, but also plasticizers, as well as other substances. Plasticizers perfectly manifest themselves with technology that involves the use of a vibrator to compact concrete. They affect concrete in the joints and reduce porosity.
Grease for formwork "Emulsol" demonstrates itsstability, it does not exfoliate for a week or even more. Its use completely guarantees the absence of the effect of sticking of the structure to the elements of the formwork. Among other things, the mentioned composition of the combined type keeps well on the surface after application and does not soil the concrete.
Positive grease features
If you decide to use a formwork lubricant in the process of building your house, you can be sure that it:
- prolong the life of the elements of the formwork;
- leave the concrete after curing unscathed;
- simplify stripping;
- in the presence of special additives in the composition will make the concrete not so porous.
The composition of lubricants and their cost
Emulsions are used as lubricants.can be represented by an aqueous solution of soap and kerosene, as well as an aqueous solution of oil. The composition of such products contains and suspensions, which are a mixture of clay and oil or water with chalk. The lubricant for forms and shuttering type formwork used in the construction of underground reinforced concrete structures has bitumen and kerosene. These lubricants can be used for steel forms, as well as for formwork of boards or plastic. Board formwork is easy to dismantle after applying petrolatum-solar compositions on their inner surface.
Formwork lubricant, the price of which may bedifferent, depending on the manufacturer and characteristics, is required if you plan to use elements of the enclosing system several times during construction. Such compositions can be purchased from 75 rubles per kilogram. The use of lubricant will allow in a shorter time to dismantle, which significantly reduces labor costs and approximates completion of work.
