Cement, fine aggregate, water, lime, active admixture or additives added as required, and the mortar mixed on site can be divided into cement mortar and cement mixed mortar. Generally speaking, 1: 3 cement mortar is composed of 1 unit cement and 3 units sand, which actually ignores the composition of water. Generally, the ratio of 1: 3: 0.6 is about 0.6, and the density of cement mortar should be 2000 kg /M3. Third: how to transform the external walls of rural buildings? 1, shovel old bricks and transform new tiles. The first step to transform the old tile wall is to ask the professional brick demolition team to knock out all the old tiles first, then repair and level some damaged parts, and do a good job of grassroots treatment before making new tiles. The advantage of this transformation method is that removing the old tiles can prevent the sequelae caused by the wall. To tell the truth, it's like putting tiles on a new wall again.
However, this transformation method needs to dismantle the old tiles, which takes a long time and may destroy the wall in the process of demolition. Please stick the new tile directly on the old one. First of all, you can remove the tiles that are seriously swollen or damaged on the wall, then smooth them with greasy things, then treat the surface of the old tiles with professional treatment agents or cinnamon cotton, and then directly lay new tiles on the surface of the old tiles. Instead of tearing down old tiles, new tiles are laid directly, saving construction time and cost. However, this method requires high quality of materials and structures. Once the operation is improper, it is easy to appear dangerous phenomena such as empty drum and falling off in the future. In addition, the thickness of the wall will become thicker, giving people a feeling of disharmony with the original window lines and components. 3. Draw on the old tiles. Turning over old and new tiles with paint is the darling of transformation in recent years.
Paint construction can safely, conveniently and customize the external wall, and can also achieve the painting effect that ceramic tiles can't achieve. Before renovation with paint, check the wall surface, repair the damaged tiles, and then transform the putty with special tiles, according to the paint construction technology. The exterior wall paint can be selected from real stone paint, liquid granite paint, texture paint and latex paint according to the required effect and budget. Fourth: How to buy self-built cement in rural areas? 1, on the package. Everyone has to produce cement from big factories, which is generally good cement. The outer packaging label will be clear and the producer information will be complete, including the implementation standard, packaging date, net weight, factory number, registered trademark, etc. It also depends on whether the seal is tight and whether the edge of the seal is usually round. 2. From the color point of view.
Generally the color of cement is dark gray or dark green. If it is yellow or white, you know that the cement strength is unqualified. 3. From the perspective of texture. Be sure to open it when choosing cement. Because good cement is powder and bad cement is condensed, you must not buy massive cement when you see it. 4. Starting from the date. The storage period of cement is generally 3 months, and it should be stored in a cool and dry place. When looking at expired cement, don't buy it blindly, because it is cheap. Especially after more than six months, if you buy this kind of cement and use it at home, there will often be serious consequences. If a friend plans to build a house in the countryside during the New Year, don't put tiles on it. Choosing pure cement mortar is out of date, with low cost, simple construction, strong durability and much easier later maintenance!