PCI Level I & II Questions and Answers

PCI Level I & II Questions and Answers ASTM American Society for Testing and Materials ASTM C31/C31M Making and Curing Concrete Test Specimens in the Field Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Brainpower Read More Granular materials used with cementing medium to form hydraulic-cement, concrete, or mortar are called? Aggregates ASTM C138 This test method covers determination of the density of freshly mixed concrete and gives formulas for calculating the unit weight, yield or relative yield, cement content, and air content of the concrete. Water that rises to the surface of a freshly placed concrete is called? Bleed Water A condition where two parallel edges of the panel are in the same plane and the portions of the panel between the edges is out of plane is called? Bowing The finish of concrete cast without forms that usually requires manual or machine finish is called Unformed Surface Finish The finish of concrete cast directly against a form is called As-Cast Formed Finish ASTM C143 Standard Test Method for Slump of Hydraulic-Cement Concrete A substance placed on a material to prevent it from bonding to the concrete or between a face material and the concrete backup is called? Bond Breaker ASTM C172 Standard Practice for Sampling Freshly Mixed Concrete Material other than water, aggregates, cement, or fiber used in concrete, mortar, or grout added to batch immediately before or during mixing to modify concrete properties is called _______________ Admixture ASTM C173 Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method ASTM C231 Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method ASTM C1064 Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete PCI MNL-130 GFRC QSM Quality System Manual AWS D1.1 Structural Welding Code Steel ASTM A706 Reinforcing Steel does include weldability as a required property For aggregates predominantly retained on the #4 sieve, the portion retained are called? Coarse Aggregates Cements must conform to ASTM C150 Lightweight Concrete must conform to ASTM C330 Fine and Coarse Aggregates must conform to ASTM C33 Fineness modulus of fine aggregates for structural products must always be within _________________ to conform to ASTM C33. Architectural products are exempt when trying to get a certain finish. 2.3 to 3.1 with a variation of +/- 0.2 between gradations Portable or Municipal water used in batching is required to be tested annually? True or False False (No test is required) Well water used for batching is required to be tested Annually SCC stands for Self-Consolidating Concrete ASTM C1611 SCC Slump flow test Compaction process whereby the volume of concrete is reduced to minimal practical space usually by vibration, tamping, or both. Accelerating admixture are allowed to have ____________% calcium chloride 0 Calcium Chloride is not allowed in admixtures because it causes Corrosion Consolidation process of inducing a closer arrangement of solid particles in freshly mixed concrete with or without vibration, rodding, tamping e.t.c ASTM C1621 Evaluates SCC ability to pass through a device that simulates a reinforcing cage ASTM C494 Corrosion- inhibiting admixtures ASTM C979 Pigments for Integrally colored concrete A zero slump concrete is called? Dry-Mix Concrete ASTM C171 Standard specification for sheet material used for curing The term SSD stands for? Saturated Surface-Dry If a Mix Design requires 1700 lb of coarse aggregate at SSD, what amount needs to be weighed if the aggregates absorb 0.9% moisture? Approximately 1685 lb If a Mix Design requires 1200 lb of fine aggregate at SSD, what amount needs to be weighed if the aggregates contains free moisture of 2.5%? 1230 lb Referencing the previous question, if the water for the design was 290 lb, what happens to water added to the mix after moisture adjustments? a) The water increases b) The water decreases c) the water remains the same b) The water decreases (to account for the water being added from the fine aggregates) Dunnage Materials used for keeping concrete elements from touching each other or other materials during storage ASTM A416 Specification for Prestressing Strand Aggregates that almost entirely passes through the #4 sieve and largely retained on the #200 sieve are called Fine aggregates What dimension of rectangular or square form should be measured for squareness? Diagonal dimension Increase in length of prestressing steel under the applied prestressing force is called Elongation ASTM C578 Specification for Insulation used as thermal insulation TM-103 Discusses concrete mix proportions General purpose cement with no special properties is? Type I Cement A moderate Sulphur resistant cement is? Type II Cement A high early strength cement is? Type III Cement Low heat of hydration cement is? Type IV Cement