4. Briefly describe: geonets, geocells and degradableerosion mats.5. The tensile strength of blue gum timber is50 MPa at a moisture content of 12 percent. Ifthe strength determined in its green state was42 MPa, and its fibre saturation point occurs ata moisture content of 25 °C, find the strength ofthis timber at a moisture content of 8 percent.If the density of the wood was 1.4 g/cm' atmoisture content of 12 percent, find the densityat a moisture content of 8 percent.6. (a) Briefly describe glass as a building material.(b) Briefly describe three main types of paint.(i) Assuming paint has 42 percent volume ofsolids, find the area that 1 litre will cover when adry film thickness of 38.1 microns is required.(ii) The walls of a room are 3 metres high, witha total of 30 metres of wall length. The totaldoor and window area is 3 square metres. Ifthe spreading rate is 11 square metres perlitre, and only two coats of paint are required,work out how much paint is needed.

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Answered: 4. Briefly describe: geonets, geocells…

Engineering

Civil Engineering

4. Briefly describe: geonets, geocells and degradable erosion mats.

Construction Materials, Methods and Techniques (MindTap Course List)

4th Edition

ISBN:9781305086272

Author:William P. Spence, Eva Kultermann

Publisher:William P. Spence, Eva Kultermann

Chapter18: Wood, Plastics, And Composites

Section: Chapter Questions

Problem 5RQ

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Concept explainers

Pricing Excavation and Backfill

Backfill, in construction, is the activity of returning the soil and gravel that are removed during building construction or using them again to toughen and support the foundation of the building or any other structural component.

Question

4. Briefly describe: geonets, geocells and degradable
erosion mats.
5. The tensile strength of blue gum timber is
50 MPa at a moisture content of 12 percent. If
the strength determined in its green state was
42 MPa, and its fibre saturation point occurs at
a moisture content of 25 °C, find the strength of
this timber at a moisture content of 8 percent.
If the density of the wood was 1.4 g/cm' at
moisture content of 12 percent, find the density
at a moisture content of 8 percent.
6. (a) Briefly describe glass as a building material.
(b) Briefly describe three main types of paint.
(i) Assuming paint has 42 percent volume of
solids, find the area that 1 litre will cover when a
dry film thickness of 38.1 microns is required.
(ii) The walls of a room are 3 metres high, with
a total of 30 metres of wall length. The total
door and window area is 3 square metres. If
the spreading rate is 11 square metres per
litre, and only two coats of paint are required,
work out how much paint is needed.

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