Major Work Activity D - Finishes plastic concrete

Table of Contents

Task D-9 Floats concrete

Task Descriptor

Concrete finishers float the surface to prepare for final finishing or to produce a final non-slip finish. At this stage, irregularities are removed and broadcast materials may be embedded. This is the important first step in the finishing process. Timing is critical. Hand floating is commonly used at slab edges, vertical pipes, and walls, in preparation for trowelling.

D-9.01 - Floats concrete by hand

Essential Skills: Oral Communication, Thinking, Working with Others

D-9.01 - Floats concrete by hand
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-9.01.01P assess surface conditions surface conditions are assessed according to the concrete materials used, ambient conditions, and CSA A23.1
D-9.01.02P apply hand float to prepare for trowelling hand float is applied to eliminate holes and produce a consolidated surface paste to prepare for trowelling
D-9.01.03P apply hand float as a final spin-float or swirl finish hand float is applied to produce a final finish that has a non-slip texture and uniform appearance

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-9.01.01L demonstrate knowledge of techniques and tools used to float concrete by hand identify tools and floating techniques used to float concrete by hand
identify surface conditions and describe their effects on timing and floating process
explain the effect of weather conditions during floating of concrete by hand
explain the effect of admixtures in the concrete

Range of Variables

D-9.02 - Floats concrete by machine

Essential Skills: Oral Communication, Thinking, Working with Others

D-9.02 - Floats concrete by machine
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-9.02.01P assess surface conditions surface conditions are assessed according to the concrete materials used, ambient conditions, and CSA A23.1
D-9.02.02P assess work area for fresh air ventilation work area is assessed for fresh air ventilation according to provincial/territorial safety regulations
D-9.02.03P apply single machine float or double-pan machine float to prepare for trowelling machine float is applied to eliminate holes and produce a consolidated surface paste to prepare for trowelling
D-9.02.04P apply single machine float single machine float is applied to produce a final finish that has a rough non-slip texture
D-9.02.05P apply double-pan machine float double-pan machine float is applied to produce a final finish that has a fine non-slip texture and improved flatness compared to a single machine float
D-9.02.06P identify defects in blades and machine defects in blades and machine are identified according to uneven wear or damage
D-9.02.07P check emergency shut-off switch emergency shut-off switch is checked and operating correctly
D-9.02.08P apply machine float in an overlapping pattern and with different blade angles each pass of the machine is applied at 90 degrees to the prior machine float pass, and the blade angles and machine speed are adjusted according to the set of the concrete

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-9.02.01L demonstrate knowledge of the equipment and procedures used to float concrete by machine identify types of floating machines their operation and procedures for use
identify types of blades their application and procedures for use
explain the effect of blade speed and pitch on concrete surfaces
D-9.02.02L demonstrate knowledge of admixtures in concrete, their applications and effects on floating concrete by machine explain the effect of admixtures in the concrete

Range of Variables

Task D-10 Hand-tools concrete

Task Descriptor

Concrete finishers hand-tool plastic concrete to control cracking, produce finished edges, provide decorative borders and aid in the removal of formwork. Extruded surfaces are hand-tooled to complete the contoured finish.

D-10.01 - Edges perimeter of slab

Essential Skills: Oral Communication, Document Use, Thinking

D-10.01 - Edges perimeter of slab
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-10.01.01P assess surface conditions surface conditions are assessed according to ambient conditions and concrete materials set
D-10.01.02P clean adjacent surfaces adjacent surfaces are cleaned from cement paste
D-10.01.03P apply edging techniques edging techniques are applied to ensure a smooth and flat surface
D-10.01.04P select edger radius edger radius is selected according to project specifications and drawings

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-10.01.01L demonstrate knowledge of tools and equipment used to edge concrete, their application and procedures for use identify types of edgers, their application and procedures for use
identify surface conditions that affect edging

Range of Variables

D-10.02 - Finishes extruded concrete surfaces

Essential Skills: Oral Communication, Document Use, Working with Others

D-10.02 - Finishes extruded concrete surfaces
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-10.02.01P select and use specialized tools specialized tools are selected and used according to application
D-10.02.02P determine finishing technique finishing technique is determined according to project requirements
D-10.02.03P apply finishing techniques finishing techniques are applied to maintain the contour of the surface and meet project requirements

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-10.02.01L demonstrate knowledge of extruded concrete surfaces and the tools and equipment and procedures used to finish them identify types of extruded surfaces and the techniques used to produce them
identify specialized tools and the procedures used to finish extruded surfaces
describe characteristics of extruded concrete

Range of Variables

D-10.03 - Tools contraction joints

Essential Skills: Document Use, Numeracy, Thinking

D-10.03 - Tools contraction joints
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-10.03.01P assess surface conditions surface conditions are assessed according to the concrete materials used, ambient conditions, and CSA A23.1
D-10.03.02P calculate depth and spacing of contraction joints contraction joints depth and spacing is calculated according to drawings and specifications and CSA A23.1
D-10.03.03P ensure joint straightness joints are straight according to use of lines and straightedges
D-10.03.04P apply tooling techniques tooling techniques are applied according to site conditions

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-10.03.01L demonstrate knowledge of the tools and techniques used to tool contraction joints identify tools required for tooling contraction joints
explain depth and spacing as it pertains to hand-tooling concrete
describe tooling techniques and their application

Range of Variables

Task D-11 Trowels concrete

Task Descriptor

Concrete finishers trowel concrete to increase the density of the surface and to achieve the final finish. Timing is critical.

D-11.01 - Trowels concrete by hand

Essential Skills: Document Use, Working with Others, Oral Communication

D-11.01 - Trowels concrete by hand
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-11.01.01P assess surface conditions surface conditions are assessed according to the concrete materials used, ambient conditions, and CSA A23.1
D-11.01.02P apply hand trowel to concrete hand trowel is applied to small areas, slab edges, and areas inaccessible to finishing machines, to achieve a smooth finish without surface imperfections

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-11.01.01L demonstrate knowledge of techniques used to apply hand trowel to concrete without surface imperfections identify tools and their usage to apply hand trowel to concrete
identify surface imperfections their causes and techniques for correction
D-11.01.02L demonstrate knowledge of the effects of various factors on the procedures used to trowel concrete by hand describe the effects of trowel pitch and force
describe the procedures used to trowel concrete by hand

Range of Variables

D-11.02 - Trowels concrete by machine

Essential Skills: Document Use, Working with Others, Thinking

D-11.02 - Trowels concrete by machine
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-11.02.01P assess surface conditions surface conditions are assessed according to the concrete materials used, ambient conditions, and CSA A23.1
D-11.02.02P assess work area for fresh air ventilation work area is assessed for fresh air ventilation according to provincial/territorial safety regulations
D-11.02.03P apply various trowelling techniques trowelling techniques are applied according to the set of the concrete, ambient conditions, and project plans and specifications
D-11.02.04P identify defects in trowel blades defects in trowel blades are identified and blades are replaced
D-11.02.05P check emergency shut-off switch emergency shut-off switch is checked and operating correctly
D-11.02.06P use power trowel power trowel is used to achieve a smooth finish without surface imperfections and according to project plans and specifications

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-11.02.01L demonstrate knowledge of the tools and equipment and techniques used to trowel concrete by machine identify types of machines used for troweling and their procedures for use
identify the effects of types of blades on concrete surface
identify trowelling techniques used to trowel concrete by machine
D-11.02.02L demonstrate knowledge of the effects of various factors on procedures used to trowel concrete by machine describe the effects of weather conditions on the concrete
describe the effects of admixtures in the concrete
describe the effects of poor ventilation on slab surface (for health and safety and carbonation)

Range of Variables

Task D-12 Applies surface treatments to concrete

Task Descriptor

Concrete finishers apply surface treatments to plastic concrete to achieve specified surface finishes. It is critical that surface treatments be performed at the right time.

D-12.01 - Applies dry-shake aggregate surface hardeners

Essential Skills: Document Use, Thinking, Numeracy

D-12.01 - Applies dry-shake aggregate surface hardeners
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-12.01.01P assess surface conditions surface conditions are assessed according to the concrete materials used, ambient conditions and manufacturers’ instructions
D-12.01.02P calculate quantity of materials to be applied materials are calculated according to placement size, drawings and specifications
D-12.01.03P select and use tools and equipment tools and equipment are selected and used according to application rate
D-12.01.04P apply techniques techniques are applied to achieve surface finish according to drawings and specifications
D-12.01.05P installs dry-shake hardeners dry-shake hardeners are installed evenly and in specified quantity according to drawings and specifications, and manufacturers’ instructions
D-12.01.06P float product into the concrete surface product is floated into the concrete surface according to site conditions and manufacturers’ instructions

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-12.01.01L demonstrate knowledge of products and the techniques used to broadcast them on concrete surface identify types of dry-shake hardeners and their application procedures
D-12.01.02L demonstrate knowledge of the factors that affect dry-shake aggregate surface hardeners on concrete explain the effect of improper application and finishing of dry-shake aggregate surface hardeners
explain the effects of surface conditions on dry-shake aggregate surface hardeners

Range of Variables

D-12.02 - Applies exposed aggregate finish

Essential Skills: Numeracy, Document Use, Thinking

D-12.02 - Applies exposed aggregate finish
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-12.02.01P assess surface conditions surface conditions are assessed according to the concrete materials used, and ambient conditions
D-12.02.02P determine requirement for and amount of surface retarder requirement and amount of surface retarder is determined according to drawings and specifications, and manufacturers’ instructions
D-12.02.03P select and use tools and equipment tools and equipment are selected and used according to manufacturers’ instructions
D-12.02.04P apply surface retarder surface retarder is applied according to ambient conditions and manufacturers’ instructions

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-12.02.01L demonstrate knowledge of exposed aggregate finish and the procedures used for application identify types of exposed aggregate finish and the procedures used to expose the aggregate
identify tools and equipment used to apply surface retarder
explain how to broadcast aggregate uniformly or in desired pattern
explain the saturated surface-dry (SSD) requirements for aggregate
D-12.02.02L demonstrate knowledge of the factors that affect applying retarders explain how surface conditions affect the application of surface retarders

Range of Variables

D-12.03 - Textures concrete surface

Essential Skills: Document Use, Thinking, Working with Others

D-12.03 - Textures concrete surface
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-12.03.01P assess surface conditions surface conditions are assessed according to the concrete materials used, and ambient conditions
D-12.03.02P select and use tools and equipment tools and equipment are selected and used to produce the desired texture
D-12.03.03P apply texturing techniques texturing techniques are applied to achieve patterns according to drawings and specifications

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-12.03.01L demonstrate knowledge of the requirements and techniques for texturing concrete surfaces identify types of textured surfaces and the techniques required to achieve them
identify tools and equipment used for texturing surfaces
D-12.03.02L demonstrate knowledge of the factors that affect texturing concrete explain how surface conditions affect the texturing process

Range of Variables

D-12.04 - Applies stamped concrete surface finish

Essential Skills: Thinking, Working with Others, Numeracy

D-12.04 - Applies stamped concrete surface finish
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-12.04.01P assess surface conditions surface conditions are assessed according to the concrete materials used, and ambient conditions
D-12.04.02P protect surrounding area surrounding area is protected from broadcast products
D-12.04.03P apply release agents release agents are applied according to manufacturers’ instructions
D-12.04.04P lay out pattern pattern is laid out according to manufacturers’ instructions
D-12.04.05P stamp pattern pattern is stamped consistently for location and depth

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-12.04.01L demonstrate knowledge of stamps, patterns, designs and the procedures used to stamp concrete identify types of patterns for stamping concrete surfaces and the procedures for use
identify different types of stamping tools for stamping concrete surfaces
identify mix design required to accommodate pattern
identify stamp compositions
D-12.04.02L demonstrate knowledge of the factors that affect stamping of concrete describe the effects of broadcast products on setting time prior to stamping
describe the effects of weather conditions on stamping procedures
identify the use of evaporation reducers prior to stamping concrete surfaces

Range of Variables

D-12.05 - Applies evaporation reducers

Essential Skills: Numeracy, Document Use, Thinking

D-12.05 - Applies evaporation reducers
NL NS PE NB QC ON MB SK AB BC NT YT NU
yes NV NV NV yes yes yes ND NV yes ND ND ND
Skills
Reference Code Performance Criteria Evidence of Attainment
D-12.05.01P assess surface conditions surface conditions are assessed according to the concrete materials used and ambient conditions
D-12.05.02P determine requirement for and amount of evaporation reducer requirement and amount of evaporation reducer is determined according to manufacturers’ instructions
D-12.05.03P select and use tools and equipment tools and equipment are selected and used to ensure even coverage
D-12.05.04P apply surface evaporation reducers surface evaporation reducers are applied to maintain surface plasticity and minimize concrete mix water evaporation

Range of Variables

Knowledge
Reference Code Learning Outcomes Learning Objectives
D-12.05.01L demonstrate knowledge of evaporation reducers and the procedures used for application identify evaporation reducers and their applications
identify tools and equipment used to apply evaporation reducers
identify procedures used to apply evaporation reducers
explain mixing procedures for evaporation reducers
D-12.05.02L demonstrate knowledge of the factors that affect applying evaporation reducers explain how surface conditions affect the application of evaporation reducers

Range of Variables