Table of Contents
Task E-13 Cures concrete
Task Descriptor
Concrete finishers cure concrete to maximize its strength and increase its durability. Correct temperature and moisture retention is important to the curing process.
E-13.01 - Wet-cures concrete
Essential Skills: Thinking, Document Use, Digital Technology
E-13.01 - Wet-cures concrete
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Skills
Reference Code |
Performance Criteria |
Evidence of Attainment |
E-13.01.01P |
select and use tools and equipment |
tools and equipment are selected and used according to application |
E-13.01.02P |
pond (flood) concrete |
concrete is ponded according to ACI guides, and drawings and specifications |
E-13.01.03P |
apply water using sprinklers |
sprinklers are set up to continuously apply water onto hardened concrete to maintain moisture and control temperature according to drawings and specifications |
E-13.01.04P |
fog or mist air space surrounding concrete |
fog or mist is applied to increase humidity level according to drawings and specifications |
E-13.01.05P |
cover concrete with materials |
materials are used according to ACI guides, and drawings and specifications to maintain required temperature and retain moisture |
E-13.01.06P |
check concrete during curing |
concrete is checked for temperature and moisture of concrete to ensure the curing process takes place according to CSA A23.1, ACI guides, and drawings and specifications |
Range of Variables
- tools and equipment includes: sprinklers, soaker hose, fogging and misting systems
- materials include: wet burlap, curing blankets, polyethylene sheeting
Knowledge
Reference Code |
Learning Outcomes |
Learning Objectives |
E-13.01.01L |
demonstrate knowledge of the processes, requirements and techniques used in wet-curing concrete |
identify the tools and equipment and materials used in the process of wet-curing concrete |
explain the requirements for proper hydration of concrete during the wet-curing process |
explain the requirements for proper temperature of concrete during the wet-curing process |
describe the process and techniques of wet-curing concrete |
identify types of cement and timings related to curing |
explain the consequences of improper curing |
Range of Variables
- tools and equipment includes: sprinklers, soaker hose, fogging and misting systems
- materials include: wet burlap, curing blankets, polyethylene sheeting
E-13.02 - Chemical cures concrete
Essential Skills: Document Use, Thinking, Working with Others
E-13.02 - Chemical cures concrete
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Skills
Reference Code |
Performance Criteria |
Evidence of Attainment |
E-13.02.01P |
select curing compound |
curing compound is selected according to drawings and specifications |
E-13.02.02P |
select and use tools and equipment |
tools and equipment are selected and used according to application |
E-13.02.03P |
apply curing compound |
curing compound is applied to ensure complete and uniform coverage |
Range of Variables
- curing compounds include: clear membrane, fugitive dye, dissipating curing compound, water-based, solvent-based
- tools and equipment include: roller, spray can, PPE
Knowledge
Reference Code |
Learning Outcomes |
Learning Objectives |
E-13.02.01L |
demonstrate knowledge of applications and procedures used in chemical curing |
identify types of curing compounds |
identify types of cement and timings related to curing |
describe the effects of curing compounds on the curing process |
identify the risks associated with and the safe work practices of applying curing compounds |
describe application procedure of curing compounds |
identify timing for the application of curing compounds |
describe safe work practices pertaining to the use of seamless systems |
Range of Variables
- curing compounds include: clear membrane, fugitive dye, dissipating curing compound, water-based, solvent-based
Task E-14 Creates contraction joints
Task Descriptor
Contraction joints are placed in green concrete in pre-determined locations in an effort to control cracking caused by drying shrinkage.
E-14.01 - Saw cuts contraction joints
Essential Skills: Document Use, Numeracy, Thinking
E-14.01 - Saw cuts contraction joints
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Skills
Reference Code |
Performance Criteria |
Evidence of Attainment |
E-14.01.01P |
identify location, spacing and depth of contraction joints |
location, spacing and depth of contraction joints are identified according to drawings and specifications, CSA A23.1 and industry practices |
E-14.01.02P |
install contraction joints in green concrete |
contraction joints are installed in designated locations to promote controlled cracking |
Knowledge
Reference Code |
Learning Outcomes |
Learning Objectives |
E-14.01.01L |
demonstrate knowledge of tools and equipment and procedures to saw cut contraction joints |
identify tools and equipment required for wet and early entry cutting |
describe procedures for saw cutting contraction joints |
Range of Variables
- tools and equipment include: string line, measuring tape, chalk line, wet saw, early entry saw, cut-off saw (quick cut)
E-14.02 - Fills joints
Essential Skills: Thinking, Document Use, Working with Others
E-14.02 - Fills joints
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Skills
Reference Code |
Performance Criteria |
Evidence of Attainment |
E-14.02.01P |
clean joints |
joints are cleaned to remove contaminants and promote bonding |
E-14.02.02P |
place a backing rod in joints |
a backing rod is placed to control joint filler depth and surface profile finish according to drawings and specifications |
E-14.02.03P |
mix joint sealant or joint filler |
joint sealant or joint filler is mixed according to manufacturers' instructions |
E-14.02.04P |
install joint sealant or joint filler |
joint sealant is installed to keep joint clean, and joint filler is installed to protect joint edges from solid tire traffic according to manufacturers' instructions |
Range of Variables
- joint sealant or joint filler include: self-levelling, non-sag
Knowledge
Reference Code |
Learning Outcomes |
Learning Objectives |
E-14.02.01L |
demonstrate knowledge of tools and equipment and procedures to fill contraction joints |
identify tools and equipment required for filling joints |
describe procedures for filling contraction joints |
identify timing and conditions for application of joint filling |
Task E-15 Protects concrete
Task Descriptor
Concrete finishers need to physically protect concrete from the surrounding elements, temperature variations and access during its setting and hardening. This helps to improve durability of the concrete and protect it from damage.
E-15.01 - Protects plastic concrete
Essential Skills: Document Use, Digital Technology, Thinking
E-15.01 - Protects plastic concrete
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Skills
Reference Code |
Performance Criteria |
Evidence of Attainment |
E-15.01.01P |
insulate surface of concrete |
surface of concrete is insulated with materials for heat retention |
E-15.01.02P |
identify concrete temperature |
concrete’s temperature is identified |
E-15.01.03P |
wet sub-base, formwork and other contact surfaces |
sub-base, formwork and other contact surfaces are wet to avoid wicking and maintain moisture of concrete |
E-15.01.04P |
set up hoarding and heaters |
hoarding and heaters are set up to prevent concrete from freezing |
E-15.01.05P |
set up wind breaks and shade |
wind breaks and shade are set up to prevent concrete from freezing and protect from surface drying and hot weather |
E-15.01.06P |
apply evaporation reducers |
evaporation reducers are applied to prevent surface moisture loss |
E-15.01.07P |
restrict access using barricades |
barricades are used to restrict access |
Range of Variables
- materials include: straw and polyethylene, insulated tarps, electric blankets
- barricades include: caution tape, ribbon, safety fence, pylons, wooden barricades
Knowledge
Reference Code |
Learning Outcomes |
Learning Objectives |
E-15.01.01L |
demonstrate knowledge of how temperature affects concrete |
describe the effects of ground and air temperature on concrete |
identify temperature of concrete and its effect on set |
identify temperature ranges for curing processes |
identify plan to control the weather variables |
identify the effects of water, ice and warm water on the concrete mix |
Range of Variables
- weather variables include: wind, sun, rain, snow, humidity, temperature
E-15.02 - Protects hardened concrete
Essential Skills: Document Use, Numeracy, Thinking
E-15.02 - Protects hardened concrete
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Skills
Reference Code |
Performance Criteria |
Evidence of Attainment |
E-15.02.01P |
insulate work area |
work area is insulated with materials for heat retention |
E-15.02.02P |
set up hoarding and heaters |
hoarding and heaters are set up to prevent concrete from freezing |
E-15.02.03P |
restrict access using barricades |
barricades are used to restrict access |
E-15.02.04P |
set up reshoring |
reshoring is set in correct location |
Range of Variables
- materials include: straw and polyethylene, insulated tarps, electric blankets, reshoring
- barricades include: caution tape, ribbon, safety fence, pylons, wooden barricades
Knowledge
Reference Code |
Learning Outcomes |
Learning Objectives |
E-15.02.01L |
demonstrate knowledge of how temperature affects concrete |
describe the effects of ground and air temperature on concrete |
identify temperature ranges for curing processes |
identify plan to control the weather variables |
Range of Variables
- weather variables include: wind, sun, rain, snow, humidity, temperature