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Grouting Technology


Quiz Questions

1._________________ is a mixture of cementitious or non-cementitious material, with or without aggregate, to which sufficient water or other fluid is added to produce a flowing consistency.
Grout
Lime
2. The rapid development of rigidity in a freshly mixed grout without the evolution of much heat is known as a ________________.
False Set
True Set
3.Circuit grouting is a grout that has an artificially induced cohesiveness, or the ability to retain the dispersed solid particles in suspension; i.e., a grout mixture that does not settle or bleed.
True
False
4._________________ is a clay composed principally of minerals of the montmorillonite group, characterized by high adsorption and very large volume change with wetting.
Bentonite
Aquitard
5.A stratum or zone below the surface of the earth capable of producing water as from a well is called as a _________________.
Aquiclude
Aquifer
6.Quantity of cement contained in a unit volume of grout, expressed as weight or volume is called Cement Factor.
True
False
7. _________________ is defined as the heat generated by chemical reactions of cementitious materials with water, such as that evolved during the setting and hardening of portland cement.
Heat of Hydration
Final set
8.A stage is one complete operational cycle of drilling, cleaning, pressure washing, pressure testing, pressure grouting, and grout cleanout within a zone
True
False
9._______________ is the rate of discharge of water under laminar flow conditions through a unit cross-sectional area of a porous medium under a unit hydraulic gradient and standard temperature conditions.
Permeability
Pressure
10.Primary Porosity is the porosity that develops during final stages of sedimentation or that was present within the sedimentary particles at the time of deposition.
True
False
11.________________ is the point during grout injection when little or no grout is accepted under the maximum allowable pressure or other specified conditions.
Refusal
Porosity
12._______________ is defined as the fracturing of an embankment or underground strata by pumping water under a pressure in excess of the tensile strength and minor principal stress.
Hydro-fracturing
Hydration
13.Harmful or deleterious reactions between sulfates in soil or groundwater and grout is called Sulfate Attack.
True
False
14._______________ is the property of a material that enables it to stiffen in a short period, on standing, and to regain its initial viscosity by mechanical agitation.
Thixotropy
Tertiary
15._______________ is the ratio of the volume of void space to the volume of solid particles in a given soil ass.
Void Ratio
Unit Ratio
16.Working pressure is the upper surface of a saturation zone, except where that surface is formed by an impermeable body.
True
False
17.The term ______________ refers to the spatial relationships of rocks and their discontinuities and affects engineering projects in many ways.
Rock structure
Geology
18.Faults are fractures along which masses of rock have been moved in a direction parallel to the fault surface.
True
False
19.Any material other than water, fine aggregate, and hydraulic cement added to the grout immediately before or during its mixing to alter its chemical or physical properties to a desired characteristic during its fluid or plastic state is classified as an _________________.
Admixture
Fillers
20.The quality of the groundwater is primarily due to the mineralogical character of the reservoir rocks and their degree of volubility in water.
True
False