Explain Distortion of flat, square, and round pieces as affected by direction of growth rings after seasoning.
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Explain Distortion of flat, square, and round pieces as affected by direction of growth rings after seasoning.
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- How different is crushing from grinding? Identify three shaping processes and plastic forming methods each. What is that feature of glass that distinguishes it from traditional and advanced ceramics?A pine wood specimen was prepared with actual dimensions of 50 mmx50 mm x 250 mm and grain parallel to its length. The deformation was measured over a gauge length of 200 mm. The specimen was subjected to compression parallel to the grain failure. The load- deformation results are shown in table below: Load (kN) Deformation (mm) 8.9 0.457 17.8 0.597 26.7 0.724 34.5 0.838 43 0.965 52.9 1.118 62.01 1.27 71.03 1.422 80.1 1.588 89 1.765 99.6 1.956 108 2.159 111.3 2.311 112 2.456 a. Using a computer spreadsheet program, plot the stress-strain relationship. b. Calculate the modulus of elasticity. С. What is the failure stress?Will the immersion of the aggregates in water saturated its voids? Explain briefly.
- Why some types of aggregate are susceptible to damage from repeated freezing and thawing? Explain.please answer these two question 1.Explain the reason that flexural modulus of elasticity and compression test modulus of elasticity must be considered separately when both the flexural test and the parallel to grain compressive test caused normal stresses parallel to the grain of the wood. 2. Discuss the difference between isotropic and orthotropic materials for wood.Collect a variety of samples of wood species used in construction and conduct various tests, such as:- Tension and compression tests.
- Calculate the modulus of elasticity of the wood specimen with the stress-strain relationship shown in figure below. 25 20 15 10 0.1 0.2 0.3 0.4 0.5 STRAIN (%) COMPRESSIVE STRESS PARALLEL TO GRAINS (MPA)Briefly explain the carbonation process of concrete. Being a structural engineer, how you can reduce the rate of carbonation in concrete.a) How to prepare samples and perform thermal expansion tests ASTM E831? b) how to perform tensile strength test ASTM E8 /E8M?