Coarse aggregates - Study guides, Class notes & Summaries

CMT Material Testing ANSWER- is a well-established technique used to determine the physical and mechanical properties of a materials and its components. 1. Quality of materials : 2. Cement-sand-gravel ratio 3. Water/cement ratio (w/c ratio) 4. Workability 5. Curing 6. Quality of machinery used in construction e.g. Mixer, Vibrator 7. Method of construction and speed of work: 8. Skills and experience of labor ANSWER- Factors affecting the quality of construction: Cement ANSWER...

ASTM D75 - Standard Practice for Sampling Aggregates Revision Quiz Answered Correctly Practice D75 is applicable only to the sampling of fine aggregate. T/F - ANSWER : False , coarse and fine aggregate D75, 1.1 The smallest sieve opening through which the entire amount of aggregate is required to pass is known as _____. - ANSWER : maximum size of aggregate D75, 3.1.1 When sampling from a flowing aggregate stream, select the units to be sampled _____ . - ANSWER : by a random me...

ACI AGGREGATE TESTING TECHNICIAN EXAM QUESTIONS AND ANSWERS 100% PASS Performance Checklist: Sampling of Aggregates: Flowing Aggregate Stream (Bins or Belt Discharge) 5 steps 1. Use a device that will hold the required amount of material without overflowing. 2. Take each increment from the entire cross section of the material discharge stream 3. Obtain a minimum of three approximately equal increments. 4. Combine the increments to form a field sample. 5. Ensure that the ...

Concrete is a mixture of _____, ______, and ______. correct answers cement, water, and aggregates. The most commonly used concrete for structural purposes is: correct answers Normal weight concrete. Normal weight concrete weighs approximately: correct answers 140 lb/ft^3 Lightweight structural concrete may weigh from _____ to ______ lb/ft^3. correct answers 90, 100 Heavyweight concrete may weigh ______. correct answers 200 lb/ft^3 or more. Most concrete today is made with: correct...

Coarse Aggregates - correct answer retain through 4.75 mm sieve Aggregates are classified into two categories: Coarse Aggregates and Fine Aggregates. - correct answer True Fine Aggregates - correct answer passes through a 4.75mm sieve A bag of cement (1 cubic foot) typically weighs how many pounds? - correct answer ...

ACI Concrete Field Testing Technician-Vocabularyadmixture - correct answer A material other than water, aggregates, cementitious materials, and fiber reinforcement, used as an ingredient of a cementitious mixture to modify its freshly mixed, setting, or hardened properties and that is added the batch before or during its mixing. agent, release - correct answer Material used to prevent bonding of concrete to a surface. aggregate - correct answer Granular material, such as sand, gravel, crus...

ACI Certification Exam Questions With Correct Answers Latest Updated 2024/2025 | Scored A+. When the concrete contains large aggregate, the testing technician should wet-sieve the sample before making unit weight tests for use in yield computations.Answer - False 4. T/F: Samples smaller than 28L (1 .) are allowed on routine air content, temperature, and slump tests.Answer - True 7. How do you regulate the rate of discharge of the batch from the revolving truck drum mixer or agitator?Answe...

PCI Quality Control Technician Level 1 - Chapter 3 Study Guide Questions With Complete Solutions You will need early strength from a concrete mixture design in order to strip the product as soon as possible. What type of cement should you consider and what characteristics make it a good choice? ASTM C150 Type III cement is used when early strength is desired. It is ground finer than the other cements and will react with water faster. Fine and coarse aggregates should generally conform to ...

Performance Checklist: Sampling of Aggregates: Flowing Aggregate Stream (Bins or Belt Discharge) 5 steps ☑: 1. Use a device that will hold the required amount of material without overflowing. 2. Take each increment from the entire cross section of the material discharge stream 3. Obtain a minimum of three approximately equal increments. 4. Combine the increments to form a field sample. 5. Ensure that the size of the field sample equals or exceeds the approximate minimum mass needed...

ACI Test Questions and Answers Guaranteed A+ The total time allowed between obtaining the first and final portions of a composite sample is 15 minutes When it is necessary to wet sieve the concrete sample, wet sieving should be performed after the individual samples are remixed into a composite sample (T or F) F Tests for slump, temperature, and air content must begin within ______ minutes after obtaining the composite sample 5 minutes Begin molding test specimens within...