CSA A23.2-3C - MAKING AND CURING COMPRESSION SPECIMENS EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

When finishing specimens, what is the max allowable depression/projection? - ANSWERS3mm for less than 35MPa, 1mm for 35MPa or greater. When tamping the second and final lift the penetration shall be about ____ into the previous layer? - ANSWERS25mm How many layers should you use to fill the mold when you're vibrating? - ANSWERS2 How many insertions per lift are required for cylinders that are consolidated by vibrating? - ANSWERS1 per layer for 100mm x 200mm, and 3 per layer for 150mm x 300mm. What is the temperature range required for laboratory specimens for final curing? - ANSWERS23C +- 2 What is the temperature range required for initial curing the field _____to_____ C? - ANSWERS15 - 25 What is the maximum allowable de-molding time for specimens? and what are the conditions? - ANSWERS76hrs max, if the concrete is less than 35MPa How long do you have to wait before transporting specimens after their initial cure? - ANSWERS20hrs Strength results may be used to detremine when ___________are able to be put into _________? - ANSWERSStructures------Service This standard covers the procedures for specimens made in the ________ or __________? - ANSWERSLab -- Field Cylinder molds must be ________enough to hold there _________ during molding? - ANSWERSRigid -- Shape Reusable molds shall be coated with a non- ________ release material? - ANSWERSReactive Flexural specimens must be at least _______mm longer than the length of the_______? - ANSWERS50 --- Span For 100 X200 mm cylinders the tamping rod shall be ______+- __mm diameter by _______X______in length - ANSWERS10 +- 1----450 ---600 For 150 X300 mm cylinders the tamping rod shall be ______+- __mm diameter by _______X______in length - ANSWERS16 +- 1----450 ---600 All tamping rods must have at least ______ hemispherical end? - ANSWERSone Rubber or rawhide mallet should approximately weigh ____ +- ____Kg? - ANSWERS0.6--0.3 External plank or table vibrators shall have a minimum frequency of_____Hz - ANSWERS60 Plank or table vibrator must have a means to _______ molds securely? - ANSWERSClamp Internal vibrators shall be ______HZ or greater, with an outside element of ____ to_____mm - ANSWERS120 -- 20 --40 A ___________ should be used to check fr