40411 Construction Materials Option 0

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Uploaded: 09.03.2013
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1. How were formed clay in nature, and what are their main characteristics?
2. Metamorphic rocks: origin, mineralogical composition, properties and applications in construction
3. Additives introduced in the clay in the manufacture of ceramic products, their purpose
4. Gypsum binders: raw materials, production methods, properties and applications
5. The difference between the air from the hydraulic lime
Objective 1
A sample of basalt weighing 109 g after waxing weighed in air 112 g, and when weighing in water - 73.5 g determine its average density, taking the true density of paraffin 0.93 g / cm3.
Task 2
Clay brick common standard sizes of the brand "125" has a mass of 3.3 kg and a true density of 2.5 g / cm3. Find porous brick and draw a conclusion about the admissibility of its application for masonry walls of residential and public buildings.
Objective 3
1 m3 of concrete consumed 290 kg of cement, 610 kg of sand, 1220 kg of gravel and 180 liters of water. Hardening cement binds 10% of water. To determine the porosity and compressive strength of concrete at 28 days of age. Brand Cement "400". Aggregate quality.


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