II. Research😟

Research

• Tensile strength is the ability of a material to resist tearing. An example of tensile strength is how much force can be put on the material before it tears apart (pounds per square inch)

• Shear is when soils fail when one block of soil moves relative to another block and the soil particles at the failure plane move over each other. When particles move across each other, the resisting (or shear) force is friction.

• To measure shear strength, we use the handheld vane shear device.

• Factors that affect shear strength include the physical characteristics of the soil (particle size, shape, distribution and orientation) as well as the stresses acting on the soil at that location.

• Friction is a key element of shear strength.

• As normal stress increases, so does frictional resistance, or shear stress.

• Soil can be categorised into sand, clay, silt, peat, chalk and loam types of soil based on the dominating size of the particles within a soil.

• The chemicals that affects the pH value of soil:

  • Acid (ph < 7)

    • Sulfuric acid (Around 6 months - a few years according to google)

    • Lemon Juice (According to a random dude on internet, it works for about 6 hours)

    • Vinegar (May take several months)

  • Alkaline (ph > 7)

    • Limestone (A few months to a few years)

    • Sodium Bicarbionate (around 24 hours)

Feedback:

• For drawings in proposals, ensure that there is no drawing, and that the drawing is made up of shapes and straight lines.

• Write formula out, show meaning of variables

E.g. W = mg

W: weight (newtons, N)

• Put a spacing between the number and the unit
  

References:

Website

· Albert, S. (2013, November 24). Adjusting soil ph. Harvest to Table. Retrieved January 25, 2022, from https://harvesttotable.com/adjusting-soil-ph/

Blog

· Andrew, L. (2021, March 4). What is the shear strength of soil? [web log]. Retrieved January 19, 2022, from http://info.tensar.co.uk/blog/what-is-the-shear-strength-of-soil

Website

· Boughton. (2021, October 15). Soil types. Boughton. Retrieved January 19, 2022, from https://www.boughton.co.uk/products/topsoils/soil-types/

Website

· Corrosionpedia. (2020, September 2). What is a tensile strength? - definition from Corrosionpedia. Corrosionpedia. Retrieved January 27, 2022, from https://www.corrosionpedia.com/definition/1072/tensile-strength

Youtube video

· Don't Memorise. (2020). Shear Stress and Shear Strain | Mechanical Properties of Solids | Don't Memorise. YouTube. Retrieved January 19, 2022, from https://youtu.be/x-UiYHyAUaM

Youtube video

· Gilson Company Inc. (2019). Approximating the Shear Strength of Cohesive Soils by the Handheld Vane Shear Device (Astm D8121). YouTube. Retrieved January 19, 2022, from https://youtu.be/JGv3S2qTATc

Website

· soils4kids. (n.d.). All about soil | soils 4 kids. What is Soil? Retrieved January 19, 2022, from https://www.soils4kids.org/about

Youtube video

· The Organic Chemistry Tutor. (2017). Tensile Stress &amp; Strain, Compressive Stress &amp; Shear Stress - Basic Introduction. YouTube. Retrieved January 19, 2022, from https://youtu.be/c6ndD5kTkP4

Report

· Types of soil for your building foundation: Uretek Gulf Coast. URETEK ICR Gulf Coast - Houston, TX. (2021, August 18). Retrieved January 24, 2022, from https://uretek-gulfcoast.com/types-soil-for-building-foundation-dirt/