Ed polycarboxylates. This compound has the function of becoming a dispersant for plasters. It can be specially formulated to provide maximum water reduction and stabilization properties within the manufacture of gypsum-based solutions. It truly is a salt that acts as a retardant, having a pH of 3.five as well as a density (20 C) of 1.05 kg/L. Right here, the lots had been denoted by the following letters: VS1 (0.two ), VS2 (0.6 ), VS3 (1.two ). Lastly, we compared the above compounds with an organic acid (citric acid), which is often made use of within a liquid phase in 25 solution or directly as a ground strong. This base includes a retarding impact on the setting method. It could also be mixed with other organic acids which include acetic or tartaric acid. This base has a pH of three and also a density (20 C) of 1.02 kg/L. Here, the lots were denoted by the following letters: I1, I2, I3. Table 3 shows the names with the additives tested with each other with all the percentages utilised to get the distinct batches, which had been tested to assess their mechanical properties.Coatings 2021, 11,five ofTable three. List of batches tested and dosages employed. The results are expressed in (W/P) with respect for the weight on the gypsum . Industrial Name Lot Test A1 Melment A2 A3 C1 SikaMix C2 C3 TAR1 SIKATARD-930 TAR2 TAR3 VS1 Viscocrete G-2 (VP) VS2 VS3 I1 Acido critico Yeso Ref. I2 I3 Y1 Mixing without having additive (W/P) 50 water Citric acid Policarboxilatos Polycarbonate salts Oprozomib Proteasome melamine Synthetic polymers of melamine Base Tested Dosage 0.two 0.six 1.2 0.2 0.six 1.2 0.two 0.six 1.two 0.two 0.six 1.two 0.02 0.06 0.12 0 Gr Additive/kg Plaster two 6 12 2 six 12 2 6 12 two 6 12 0.two 0.6 1.22.two. Solutions For the preparation of test specimens and test protocols, the UNE EN 13279-2 [24] common was followed, which establishes a minimum of 3 values per test. 3 batches have been created for each compound, using a total of twelve test tubes per batch. The dimensions were 40 40 160 mm. In ��-Amanitin Epigenetic Reader Domain Figure 1, sample specimens may be seen, which had been tested so as to assess their parameters. In Figure 1a, the untested and referenced specimen is often observed, while Figure 1b shows among the specimens right after the bending test to which they have been subjected.Figure 1. Dimensions of a common specimen and the result just after having been subjected towards the bending test, (a) strategy view of a sample test, (b) section of a test (source: supplied by the author).The gypsum water ratio (W/P) in reference to the weight was set at 0.five or 50/100 (50 g of water per one hundred g of calcium sulfate) for all tests applying additives; within this way, the outcomes could possibly be compared, due to the fact water has a marked impact around the outcome. The reference test (involving only calcium sulfate and water) was designated Y1. Following the suggestions of your makers (additive suppliers), differences in dosages have been observed; nonetheless, the percentages were unified for comparison at 0.2 , 0.six , and 1.2 of the weight of gypsum, except for citric acid bases, whose percentages have been notably reduced to 0.02 , 0.06 , and 0.12 . This decision was created primarily based on ourCoatings 2021, 11,six ofexperience to achieve sufficient operating occasions, as higher additive quantities lead to unmanageable instances. All the manufactured specimens have been subjected to the under tests. Shore C hardness test: This test was carried out in accordance together with the process stipulated under by UNE-EN196-1: 2005 [25] and UNE-EN 13279-2 [24] using a Baxlo Shore C Durometer. Flexion and modulus of elasticity test: This test was carried out in accordance with all the process indicated b.