A Concrete Field Testing Technician—Grade I is an individual who has demonstrated the knowledge and ability to properly perform and record the results of seven basic field tests on freshly mixed concrete.

Scope and Knowledge:

This program requires demonstration of the knowledge and hands-on skills covered on the Job Task Analysis (JTA):

JTA for ACI Certification of Concrete Field Testing Technician—Grade I

The JTA is a detailed list of specific points of knowledge and skills that may be included in the examinations for this ACI Certification program. ACI urges candidates to use the JTA to prepare for the certification exams.

The program requires a working knowledge of the following ASTM test methods and practices:

• C1064/C1064M – 17—Temperature of Freshly Mixed Hydraulic-Cement Concrete
• C172/C172M – 17—Sampling Freshly Mixed Concrete
• C143/C143M – 15a—Slump of Hydraulic-Cement Concrete
• C138/C138M – 17a—Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
• C231/C231M – 17a—Air Content of Freshly Mixed Concrete by the Pressure Method
• C173/C173M – 16—Air Content of Freshly Mixed Concrete by the Volumetric Method
• C31/C31M – 19—Making and Curing Concrete Test Specimens in the Field

Certification Requirements:
ACI will grant certification only to those applicants who meet both of the following requirements:

1. A passing grade on the ACI written examination; AND
2. Successful completion of the ACI performance examination.

The one-hour written examination is closed-book and consists of 55 multiple-choice questions. There are between five and ten questions on each of the ASTM test methods and practices. To pass the written examination, BOTH of the following conditions must be met:

1. At least 60% correct for each of the required test methods and practices; AND
2. A minimum score of 70% overall.

The performance examination is also “closed book” and requires actual demonstration of six of the required test methods and practices plus a verbal description of Practice C172/C172M (sampling). The examinee is judged on his/her ability to correctly perform (or describe, where allowed) all of the required steps for each procedure.

Certification is valid for a period of five years from the date of successfully completing all requirements.

Recertification requires successful completion of both the written and performance examinations.

Job-Task Analysis (JTA) for ACI Certification of
Concrete Field Testing Technician—Grade I

HOW TO USE THIS JTA:
For each of the following assessment methods, the Candidate must:
On the written examination:

• Understand the following general concepts, which may not have specified values, procedures, or measurements; and
• Know the following specific procedures or values; performance of these items may also be assessed on the performance examination.

On the performance examination:

• Perform—or describe verbally, where allowed—the following tasks or steps, which are part of the specified procedure; knowledge of these items may also be assessed on the written examination.

RESOURCES IN THIS PROGRAM:

ASTM C1064/C1064M, Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete
ASTM C172/C172M, Standard Practice for Sampling Freshly Mixed Concrete
ASTM C143/C143M, Standard Test Method for Slump of Hydraulic-Cement Concrete
ASTM C138/C138M, Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
ASTM C231/C231M, Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
ASTM C173/C173M, Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
ASTM C31/C31M, Standard Practice for Making and Curing Concrete Test Specimens in the Field

ASTM C1064/C1064M, Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete

• Understand the Scope and the Significance and Use of the test method, including time requirements based on oversize aggregates
• Know the equipment requirements
• Know the verification requirements of the equipment used in this test method
• Know the requirements for measuring temperature of concrete in either the transporting equipment or the forms
• Know the sampling requirements when not measured in transporting equipment or forms
• Perform temperature measurement as specified
• Perform reporting of temperature to the required accuracy

ASTM C172/C172M, Standard Practice for Sampling Freshly Mixed Concrete

• Understand the Scope and the Significance and Use of the practice
• Know and perform (or describe verbally) the time limit for obtaining sample portions
• Know and perform (or describe verbally) the transportation and remixing requirements within
  maximum time limits
• Know and perform (or describe verbally) the time limits for starting tests for slump, temperature,
  air content, and molding specimens for strength tests
• Know and perform (or describe verbally) protection of sample
• Know and perform (or describe verbally) the requirements for sample sizes to be used for strength
  tests, air content, temperature, and slump
• Know and perform (or describe verbally) sampling procedures from stationary mixers, paving
  mixers, revolving drum truck mixers or agitators, and continuous mixers
• Know and perform (or describe verbally) the procedure for removal of large maximum size
  aggregate

ASTM C143/C143M, Standard Test Method for Slump of Hydraulic-Cement Concrete

• Understand the Scope and the Significance and Use of the test method, including the plastic
  concrete properties appropriate for testing
• Know the equipment requirements
• Know the requirements for obtaining a sample
• Know the maximum aggregate size permitted
• Understand the time limits associated with the test
• Perform the test procedure, including filling of the mold, consolidation, lifting, and measuring as
  specified
• Perform reporting of slump to the required accuracy

ASTM C138/C138M, Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

• Understand the Scope of the test method
• Know the equipment requirements
• Understand calibrated volume of the density (unit weight) measure
• Know the requirements for obtaining a sample
• Know the capacity of measure requirements for different aggregates
• Know the requirements for consolidation
• Perform the test procedure, including filling, rodding/vibration, strike-off, cleaning, and mass
  determination of both empty and filled measure
• Know and perform the calculation and reporting of density (unit weight) to the required accuracy
• Know how to calculate and report theoretical density to the required accuracy
• Know how to calculate and report yield to the required accuracy
• Know how to calculate and report relative yield to the required accuracy
• Know how to calculate and report air content to the required accuracy

ASTM C231/C231M, Standard Test Method for Air Content of Freshly Mixed Concrete by the
Pressure Method

• Understand the Scope and the Significance and Use of the test method, including the applicable
  types of concrete appropriate for testing
• Know the equipment requirements
• Know the calibration requirements for the equipment used in this test method
• Know the requirements for obtaining a sample
• Know the maximum aggregate size permitted
• Know and perform proper procedures for sample placement and consolidation, including strike-off
• Perform test procedure (using Type A or Type B meter), including proper sequence and use of
  water, petcocks, valves, pump, and pressure gauge
• Perform reading of the pressure gauge after release of pressure into sample
• Perform proper release of pressure and disassembly of air meter
• Know and perform proper use of aggregate correction factor
• Know and perform calculation of air content of sample tested
• Perform reporting of air content to the required accuracy

ASTM C173/C173M, Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method

• Understand the Scope and the Significance and Use of the test method, including the applicable
  concrete types appropriate for testing
• Know the equipment requirements
• Know the calibration requirements for the equipment used in this test method
• Know the requirements for obtaining a sample
• Know the maximum aggregate size permitted
• Know and perform proper procedures for placement and consolidation of sample, including strikeoff
• Know and perform initial addition of water and alcohol to the air meter
• Know and perform the process of inverting, shaking, and rolling the air meter to displace the
  volume of air in the concrete specimen
• Know and perform the steps required if the reading is outside of the range of the meter
• Perform initial meter reading as specified, within allowable time & percentage limits
• Perform final meter reading as specified, within allowable time & percentage limits
• Perform the disassembly of air meter
• Know and perform examination of measuring bowl to verify a valid or invalid test
• Know and perform calculation of air content of sample tested
• Perform reporting of air content to the required accuracy

ASTM C31/C31M, Standard Practice for Making and Curing Concrete Test Specimens in the
Field

• Understand the Scope and the Significance and Use of the practice, including reasons for curing by
  standard or field methods
• Know the equipment requirements
• Know the requirements for obtaining a sample
• Know the maximum aggregate size allowed
• Know the fresh property tests to be performed when strength specimens are molded
• Know the requirements for consolidation
• Know and perform the procedure for molding cylindrical specimens, including casting,
  consolidation, finishing, identification, and protection to prevent moisture loss
• Know the procedure for molding of beam specimens, including casting, consolidation, finishing,
  identification, and protection to prevent moisture loss
• Know the requirements for standard curing including storage, initial curing, and final curing
• Know the requirements for field curing
• Know and perform (or describe verbally) the requirements for transportation of specimens to the
  laboratory
• Know the reporting requirements

A Concrete Field Testing Technician—Grade I is an individual who has demonstrated the knowledge and ability to properly perform and record the results of seven basic field tests on freshly mixed concrete.

Scope and Knowledge:

This program requires demonstration of the knowledge and hands-on skills covered on the Job Task Analysis (JTA):

JTA for ACI Certification of Concrete Field Testing Technician—Grade I

The JTA is a detailed list of specific points of knowledge and skills that may be included in the examinations for this ACI Certification program. ACI urges candidates to use the JTA to prepare for the certification exams.

The program requires a working knowledge of the following ASTM test methods and practices:

• C1064/C1064M – 17—Temperature of Freshly Mixed Hydraulic-Cement Concrete
• C172/C172M – 17—Sampling Freshly Mixed Concrete
• C143/C143M – 15a—Slump of Hydraulic-Cement Concrete
• C138/C138M – 17a—Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
• C231/C231M – 17a—Air Content of Freshly Mixed Concrete by the Pressure Method
• C173/C173M – 16—Air Content of Freshly Mixed Concrete by the Volumetric Method
• C31/C31M – 19—Making and Curing Concrete Test Specimens in the Field

Certification Requirements:
ACI will grant certification only to those applicants who meet both of the following requirements:

1. A passing grade on the ACI written examination; AND
2. Successful completion of the ACI performance examination.

The one-hour written examination is closed-book and consists of 55 multiple-choice questions. There are between five and ten questions on each of the ASTM test methods and practices. To pass the written examination, BOTH of the following conditions must be met:

1. At least 60% correct for each of the required test methods and practices; AND
2. A minimum score of 70% overall.

The performance examination is also “closed book” and requires actual demonstration of six of the required test methods and practices plus a verbal description of Practice C172/C172M (sampling). The examinee is judged on his/her ability to correctly perform (or describe, where allowed) all of the required steps for each procedure.

Certification is valid for a period of five years from the date of successfully completing all requirements.

Recertification requires successful completion of both the written and performance examinations.

Job-Task Analysis (JTA) for ACI Certification of
Concrete Field Testing Technician—Grade I

HOW TO USE THIS JTA:
For each of the following assessment methods, the Candidate must:
On the written examination:

• Understand the following general concepts, which may not have specified values, procedures, or measurements; and
• Know the following specific procedures or values; performance of these items may also be assessed on the performance examination.

On the performance examination:

• Perform—or describe verbally, where allowed—the following tasks or steps, which are part of the specified procedure; knowledge of these items may also be assessed on the written examination.

RESOURCES IN THIS PROGRAM:

ASTM C1064/C1064M, Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete
ASTM C172/C172M, Standard Practice for Sampling Freshly Mixed Concrete
ASTM C143/C143M, Standard Test Method for Slump of Hydraulic-Cement Concrete
ASTM C138/C138M, Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
ASTM C231/C231M, Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method
ASTM C173/C173M, Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
ASTM C31/C31M, Standard Practice for Making and Curing Concrete Test Specimens in the Field

ASTM C1064/C1064M, Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete

• Understand the Scope and the Significance and Use of the test method, including time requirements based on oversize aggregates
• Know the equipment requirements
• Know the verification requirements of the equipment used in this test method
• Know the requirements for measuring temperature of concrete in either the transporting equipment or the forms
• Know the sampling requirements when not measured in transporting equipment or forms
• Perform temperature measurement as specified
• Perform reporting of temperature to the required accuracy

ASTM C172/C172M, Standard Practice for Sampling Freshly Mixed Concrete

• Understand the Scope and the Significance and Use of the practice
• Know and perform (or describe verbally) the time limit for obtaining sample portions
• Know and perform (or describe verbally) the transportation and remixing requirements within
  maximum time limits
• Know and perform (or describe verbally) the time limits for starting tests for slump, temperature,
  air content, and molding specimens for strength tests
• Know and perform (or describe verbally) protection of sample
• Know and perform (or describe verbally) the requirements for sample sizes to be used for strength
  tests, air content, temperature, and slump
• Know and perform (or describe verbally) sampling procedures from stationary mixers, paving
  mixers, revolving drum truck mixers or agitators, and continuous mixers
• Know and perform (or describe verbally) the procedure for removal of large maximum size
  aggregate

ASTM C143/C143M, Standard Test Method for Slump of Hydraulic-Cement Concrete

• Understand the Scope and the Significance and Use of the test method, including the plastic
  concrete properties appropriate for testing
• Know the equipment requirements
• Know the requirements for obtaining a sample
• Know the maximum aggregate size permitted
• Understand the time limits associated with the test
• Perform the test procedure, including filling of the mold, consolidation, lifting, and measuring as
  specified
• Perform reporting of slump to the required accuracy

ASTM C138/C138M, Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

• Understand the Scope of the test method
• Know the equipment requirements
• Understand calibrated volume of the density (unit weight) measure
• Know the requirements for obtaining a sample
• Know the capacity of measure requirements for different aggregates
• Know the requirements for consolidation
• Perform the test procedure, including filling, rodding/vibration, strike-off, cleaning, and mass
  determination of both empty and filled measure
• Know and perform the calculation and reporting of density (unit weight) to the required accuracy
• Know how to calculate and report theoretical density to the required accuracy
• Know how to calculate and report yield to the required accuracy
• Know how to calculate and report relative yield to the required accuracy
• Know how to calculate and report air content to the required accuracy

ASTM C231/C231M, Standard Test Method for Air Content of Freshly Mixed Concrete by the
Pressure Method

• Understand the Scope and the Significance and Use of the test method, including the applicable
  types of concrete appropriate for testing
• Know the equipment requirements
• Know the calibration requirements for the equipment used in this test method
• Know the requirements for obtaining a sample
• Know the maximum aggregate size permitted
• Know and perform proper procedures for sample placement and consolidation, including strike-off
• Perform test procedure (using Type A or Type B meter), including proper sequence and use of
  water, petcocks, valves, pump, and pressure gauge
• Perform reading of the pressure gauge after release of pressure into sample
• Perform proper release of pressure and disassembly of air meter
• Know and perform proper use of aggregate correction factor
• Know and perform calculation of air content of sample tested
• Perform reporting of air content to the required accuracy

ASTM C173/C173M, Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method

• Understand the Scope and the Significance and Use of the test method, including the applicable
  concrete types appropriate for testing
• Know the equipment requirements
• Know the calibration requirements for the equipment used in this test method
• Know the requirements for obtaining a sample
• Know the maximum aggregate size permitted
• Know and perform proper procedures for placement and consolidation of sample, including strikeoff
• Know and perform initial addition of water and alcohol to the air meter
• Know and perform the process of inverting, shaking, and rolling the air meter to displace the
  volume of air in the concrete specimen
• Know and perform the steps required if the reading is outside of the range of the meter
• Perform initial meter reading as specified, within allowable time & percentage limits
• Perform final meter reading as specified, within allowable time & percentage limits
• Perform the disassembly of air meter
• Know and perform examination of measuring bowl to verify a valid or invalid test
• Know and perform calculation of air content of sample tested
• Perform reporting of air content to the required accuracy

ASTM C31/C31M, Standard Practice for Making and Curing Concrete Test Specimens in the
Field

• Understand the Scope and the Significance and Use of the practice, including reasons for curing by
  standard or field methods
• Know the equipment requirements
• Know the requirements for obtaining a sample
• Know the maximum aggregate size allowed
• Know the fresh property tests to be performed when strength specimens are molded
• Know the requirements for consolidation
• Know and perform the procedure for molding cylindrical specimens, including casting,
  consolidation, finishing, identification, and protection to prevent moisture loss
• Know the procedure for molding of beam specimens, including casting, consolidation, finishing,
  identification, and protection to prevent moisture loss
• Know the requirements for standard curing including storage, initial curing, and final curing
• Know the requirements for field curing
• Know and perform (or describe verbally) the requirements for transportation of specimens to the
  laboratory
• Know the reporting requirements