2023-11-27
Testing methods for stone materials
Testing methods for natural decorative stone materials GB/T 99663-2001 Test Methods for Natural Decorative Stones Part 3: Test Methods for Bulk Density, True Density, True Porosity, and Water Absorption 1 Scope This standard specifies the equipment and measuring tools, specimens, test procedures, result calculations, and test reports used for the volumetric density, true density, true porosity, and water absorption of natural decorative stone. This standard is applicable to the volume density, true density, true porosity, and water absorption tests of natural decorative stone. 2 Equipment and measuring tools 2.1 Drying oven: The temperature can be controlled within the range of 105 ℃± 2 ℃. 2.2 Balance: Maximum weighing 1000g, sensitivity 10mg; The maximum weight is 200g, and the sensitivity is 1mg. 2.3 Pycnometer: Volume 25mL to 30mL. 3 samples 3.1 Bulk density and water absorption sample: The sample is a cube with a side length of 50mm or a cylinder with a diameter and height of 50mm, with a dimensional deviation of ± 0.5mm. Five yuan per group. The sample is not allowed to have cracks. 3.2 True density and true porosity samples: Take about 1000g of clean samples and crush them into particles smaller than 5mm; Reduce to 150g using the quartering method, and then grind it into a porcelain mortar that can pass through 63? M standard sieve powder. 4 Test steps 4.1 Bulk density and water absorption rate 4.1.1 Place the sample in a drying oven at 105 ℃± 2 ℃ and dry it to a constant weight. The difference in mass between two consecutive times should be less than 0.02%. Cool it in a dryer to room temperature. Weigh its mass (m0) to the nearest 0.02g. 4.1.2 Soak the sample in distilled water at 20 ℃± 2 ℃ for 48 hours, then remove it and wipe off the surface moisture of the sample with a wrung out wet towel. Immediately weigh its mass (m1) to the nearest 0.02g. 4.1.3 Immediately place the water saturated sample in a basket and immerse the basket and sample together in distilled water at 20 ℃± 2 ℃. Weigh the sample in water (m2) (note that when weighing, carefully remove any bubbles attached to the basket and sample), accurate to 0.02g.
2023-11-27
What is natural stone?
1. Natural stone is mainly divided into two types in daily use: marble and granite. Generally speaking, anything with texture is called marble, while those with speckled spots are called granite. This is broadly speaking. Narrowly speaking, marble refers to the stone produced in Dali, Yunnan. In fact, there are not many stones that have been sorted out in various places now. 2. Marble and granite can also be distinguished from geological concepts. Granite is an igneous rock, also known as acidic crystalline plutonic rock, which is the most widely distributed type of rock in igneous rocks. It is composed of feldspar, quartz, and mica, with silica as the main component, accounting for about 65% to 75%. The rock is hard and dense 3. The so-called igneous rock is a rock formed by the condensation and crystallization of underground magma or volcanic lava. The content of silica in igneous rocks, the properties of feldspar, and their content determine the properties of stone. When the content of silicon dioxide is greater than 65%, it belongs to acidic rocks. When basic minerals such as orthoclase, plagioclase, and quartz form crystals in this rock, it has a granular structure and is called granite.
2023-11-27
Protection of doorplate stone after cleaning and renovation
After cleaning and renovation, the micropores of stone have been opened, which increases the specific surface area, so that its adsorption capacity for dust and dirt is increased. If it is not protected in time, it is easy to be polluted again.
2021-09-26
What does stone mean?
Stone is an important carrier for inscribing poems and inscriptions. The organic combination of the natural and simple shape and texture of stone and the dynamic and picturesque lines of Chinese calligraphy itself implies that human and nature are united to take the mountain as the bone.
2021-09-26
With the advent of summer, the stone materials are well maintained!
Extreme weather phenomena such as too high temperature, too dry or too much rain and too wet often occur in summer. Therefore, it is not always considered as a good season for home decoration. In fact, as long as some important matters are paid attention to in summer construction, quality problems can also be avoided. Here, the author specially collected the decoration information suitable for summer construction for you, hoping to help you pretend to love your home satisfactorily this summer!
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