26301. According to IS : 382-1963, a good aggregate should be
26302. The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be
26303. If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respetively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation
26304. For the construction of thin R.C.C. structures, the type of cement to be avoided, is
26305. Vicat apparatus is used for
26306. A symbiotic association where both the partners benefited and neither can survive without the other is called
26307. For the construction of the retaining structures, the type of concrete mix to be used, is
26308. An ideal ware house, is provided
26309. Concrete is unsuitable for compaction by a vibrator if it is
26310. Inert material of a cement concrete mix, is
26311. Sands of zone I are
26312. The lower water cement ratio in concrete, introduces
26313. The cement becomes useless if its absorbed moisture content exceeds
26314. A concrete using an air entrained cement
26315. Mycorrhizal association is present in
26316. Placing of concrete should preferably be done at a temperature of
26317. The aggregate impact value of the aggregate used in
26318. The maximum percentage of chemical ingredient of cement is that of
26319. A symbiotic association between a fungus and an alga is
26320. Sand generally contains salt if it is obtained from:
26321. The impurity of mixing water which affects the setting time and strength of concrete, is
26322. The term Edaphic factor refers to
26323. Di-calcium silicate (C2S)
26324. On a grading curve, the gap grading is represented by
26325. Bulking of sand is
26326. Curing of pavements, floors, roofs and slabs, is done by
26327. The term Ecotone is defined as
26328. The surface where two successive placements of concrete meet, is known as
26329. An excess of flaky particles in concrete aggregates
26330. 1.S.I. has specified the full strength of concrete after
26331. For given workability the grading requiring the least amount of water is one that gives
26332. The minimum percentage of chemical ingredient of cement is that of
26333. The specifications of a cement bag for storage, are
26334. The bulk density of aggregates, depends upon
26335. The bacteria found in the root nodules of leguminous plants are
26336. Horizontal construction joints in concrete walls are generally provided at
26337. National Animal of India is designated by the Scientific name of
26338. For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is
26339. The concrete mix which causes difficulty in obtaining a smooth finish, possess
26340. Le-Chatelier's apparatus is used for testing
26341. 'Ware house pack' of cement means
26342. In the method of voids for determination of the quantity of cement paste, it is assumed that
26343. If a grading curve is horizontal bet-wen the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain
26344. The size of fine aggregates does not exceed
26345. An aggregate is known as cyclopean aggregate if its size is more than
26346. The main object of compaction of concrete, is:
26347. ’Lac’is obtained from the secretion of
26348. Particles of 0.002 mm size are that of
26349. For quality control of Portland cement, the test essentially done is
26350. If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,