For my part, I consider the main advantage of the CPR to be its cost. Let's do a simple calculation. CPR = Cement + Sand + Water. The cost of a 50 kg bag of M500 cement today is 250 rubles. The cost of a 50 kg bag of sand is 50 rubles. We will take water for free. If the components Cement - Sand - Water are used in a ratio of 1: 3: 0.4 (water needs 40% by weight of cement), then the mechanical compressive strength of the screed after 28 days will be 30 N/mm2 (30 MPa). Without taking into account water, 200 kg of CPR will cost 250+3*50=400 rubles.
For comparison, let’s take a good floor leveler Litoliv Basis (manufactured by Litokol). The mechanical compressive strength after 28 days of a screed made from this product will be 30 N/mm2 (30 MPa), which does not exceed this value for the TsPR in the calculations above. The cost of a 25 kg bag of Litoliv Basis today is 450 rubles. 200 kg will cost 8*450=3600 rubles.
Thus, the cost of the CPR will be 3600/400 = 9 times less than the cost of a good Litoliv Basis floor leveler. Of course, you can find dry mixes for screed much cheaper, for example, 200 rubles for a 25 kg bag. 200 kg will cost 8*200=1600 rubles. In this case, the CPR will be 1600/400=4 times cheaper. However, the mechanical compressive strength of such screeds will not exceed 15 N/mm2 (15 MPa).
Here are the calculations. I'm waiting for your opinions.
For my part, I consider the main advantage of the CPR to be its cost. Let's do a simple calculation. CPR = Cement + Sand + Water. The cost of a 50 kg bag of M500 cement today is 250 rubles. The cost of a 50 kg bag of sand is 50 rubles. We will take water for free. If the components Cement - Sand - Water are used in a ratio of 1: 3: 0.4 (water needs 40% by weight of cement), then the mechanical compressive strength of the screed after 28 days will be 30 N/mm2 (30 MPa). Without taking into account water, 200 kg of CPR will cost 250+3*50=400 rubles.
For comparison, let’s take a good floor leveler Litoliv Basis (manufactured by Litokol). The mechanical compressive strength after 28 days of a screed made from this product will be 30 N/mm2 (30 MPa), which does not exceed this value for the TsPR in the calculations above. The cost of a 25 kg bag of Litoliv Basis today is 450 rubles. 200 kg will cost 8*450=3600 rubles.
Thus, the cost of the CPR will be 3600/400 = 9 times less than the cost of a good Litoliv Basis floor leveler. Of course, you can find dry mixes for screed much cheaper, for example, 200 rubles for a 25 kg bag. 200 kg will cost 8*200=1600 rubles. In this case, the CPR will be 1600/400=4 times cheaper. However, the mechanical compressive strength of such screeds will not exceed 15 N/mm2 (15 MPa).
Here are the calculations. I'm waiting for your opinions.
Pages