Cement solution is very strongmaterial, it quickly seizes and hardens in the air. The beginning of its setting at a temperature of +20 degrees occurs in about three quarters of an hour. The solution must be applied no later than an hour after its preparation, otherwise it loses its strength. There are different grades of cement - it depends on its components. The solutions prepared on their basis have different compressive strengths.
How to make a cement slurry
In order to prepare a cement slurry,sift sand and cement through a sieve with a hole diameter of 3 mm. The ingredients are measured in bulk doses and mixed until a uniform consistency is obtained, and if necessary, reseeded and water is added to the dry mixture until the desired density is obtained.
For laying pipes above the roof make morea complex cement slurry consisting of a filler and two binders: sand, lime dough and cement. In this case, it will be necessary to add up to three parts of lime and up to 15 parts of sand per part of the cement.
Цементный раствор используют для приготовления concrete mixes. The laid fresh concrete is covered with shavings or mattings, drenchily moistening with water. Especially it is worth doing in the first five days after laying in the formwork, for these purposes, also use polyethylene film, which creates a steam effect.
Cement solution: composition
Cement mortar for construction can bebuy or manufacture by yourself, mixing cement and sand in certain proportions (from 1 to 3, depending on the brand, to 1 to 6). It must be remembered that manually making a solution is not only tedious, but it is practically impossible to distribute all components evenly without appropriate experience. It is more practical to use a concrete mixer (mechanical or electric), which you can both buy and rent, borrow from friends.
The cement mortar is very popular,which is used for brickwork. For this, two types of solutions can be used - cement and cement-lime. With the help of the first type, the bearing walls and other elements are erected, the second one is used for some types of work (laying of internal walls), and only a small part of the cement is added to it.
If the masonry solution is used inwinter period, then it is necessary to use antifreeze additives, which will not allow the solution to freeze. And yet at a temperature below 20 degrees below zero, it is better not to make the cement mass, as these components stop working. With the help of various additives, the solution can also be given the necessary plasticity and mobility. To increase the plasticity of the solution, professionals add a normal shampoo, pouring half a liter of this ingredient into a cubic meter of cement mass. Salt as a antifreeze additive, despite the numerous recommendations, should not be poured in order to avoid the appearance of high temperatures.
Из цемента производят и бетонные жаростойкие Mixtures that are used for making structures of solid foci with open fire, for fireboxes or blocks for laying stoves. The following components and proportions are used to create fire-resistant heat-resistant solutions. If the solution is used to create hotbeds with open fire, take a cement grade of at least 400. To one part of it, add two pieces of rubble, consisting of red brick, two parts of quartz sand or thin red brick and a third of fine chamotte sand. To create the fireboxes take the same cement, rubble from bricks, ordinary and chamotte sand in a proportion of 1: 2: 2: 0.33.
