资料问答题(国外英文资料).docVIP

材料问答题(国外英文资料) After cooling 30min, scrape the sample. (2) determination of steps as follows: (1) under 80 ℃. A) put together with the base plate of the samples with sample containing 5 ℃ plus or minus 0.5 ℃ water tank in 15 min, stents, steel ball, such as locating ring is placed in the sink. B) a beaker 5 ℃ was injected in distilled water, the water is slightly lower than poling tag. C) to take out the sample ring on stents round hole, the set of the locating ring, put the cup, the ring frame to adjust the water, and keep the water temperature is 5 ℃ plus or minus 0.5 ℃. Insert the thermometer into the blank, and the bottom of the thermometer is flush with the bottom of the ring. D) remove the beaker to have asbestos network on the heating furnace of the steel ball in the middle of the locating ring after the sample of the central, start the mixer, the water oscillation, and began to heat, maintain within 3 min per minute up to 5 ℃ + 0.5 ℃. Record rise of temperature, e) samples down, down to the bottom surface of contact, immediately read the temperature, 0.5 ℃. (2) a) 80 ℃ or above puts with sample of the sample, together with the base plate is equipped with 32 ℃ + / - 1 ℃ glycerin heat preservation in the sink for at least 15 min, stents, steel ball, such as locating ring also put in glycerin. B) in the beaker into 32 ℃ glycerin, slightly lower than the markers. C) from the heat preservation tank with sample of the sample ring according to the above (1) the method of determination and read the temperature of 1 ℃ Description: a brief description of the test procedure of the rough aggregate abrasive test (Los Angeles method)? Answer: (1) clean and dry the set of different specifications. (2) of the aggregate used, according to the actual situation to choose the nearest graded categories, determine the corresponding test conditions, according to the rules of graded material, screening. (3) the rating scale (accurately to 5g), the total mass (m1), which is in the m