B.Tech Civil Special Concrete — practice questions
25 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice B.Tech Civil Special Concrete in the app →Conventional concrete has a density of about 2100–2500 kg/m³, whereas light weight concrete typically falls wiLight weight concrete is classified by the unit into three broad categories. Which set correctly names all thrAmong natural light weight aggregates listed by the unit (pumice, diatomite, scoria, volcanic cinder, sawdust,Sintered fly ash is sold in the United Kingdom as a structural light weight aggregate under which trade name?Exfoliated vermiculite produces a very light insulating concrete because the parent mineral, when heated, expaAerated concrete (also called gas, foam or cellular concrete) made by the gas concrete route uses which chemicWhich Indian trade names refer to commercial aerated concrete products described in the unit?No-fines concrete is made by omitting the sand fraction. The unit specifies the coarse aggregate must be singlIn no-fines concrete the drying shrinkage is reported at about 200 × 10⁻⁶, which is roughly:High density concrete is engineered for radiation shielding in nuclear installations. It requires the aggregatIn Limonite-bound conventional placement, high density concrete reaches a density of about 2960 kg/m³. To avoiFibre reinforced concrete is defined by the unit as a composite containing discrete, discontinuous, uniformly The 'aspect ratio' that the unit uses for sizing a fibre is defined as:Experimental data in the unit (Table 11.3) show that the strength of fibre reinforced concrete with randomly dGlass fibres used alone in concrete suffer surface degradation by hydrated cement paste. The unit attributes tAlthough plastic fibres such as nylon and polypropylene have low Young's modulus and contribute little to ultiThe trade name 'Wirand' refers to a commercial fibre reinforced concrete whose properties the unit compares wiPolymer Impregnated Concrete (PIC) is produced by impregnating a hardened concrete with a low-viscosity monomeIn Polymer Concrete (PC), unlike ordinary concrete, the binder for the aggregates is not Portland cement but:Surface coated polymer concrete has been used to improve durability of bridge decks. The unit specifies treatmPumice has a bulk density of 500–900 kg/m³ and is the only natural light weight aggregate used widely. The uniLight weight aggregates such as expanded perlite, sintered fly ash and bloated clay typically absorb water rapAsbestos fibre has been used to reinforce Portland cement, giving considerably high flexural strength. The uniCarbon fibre reinforced cement composite (with about 8 percent fibre by volume and aligned fibres) is reportedPer the unit's mix proportions for fibre reinforced concrete, the recommended steel fibre volume in the mix li