Curing Concrete - Portland Cement Association

Curing Concrete - Portland Cement Association

Curing Concrete Design and Control of Concrete Mixtures Chapter 15 Overview Curing basics Curing methods and materials Curing period and temperature Sealing compounds

Curing Concrete Curing Concrete Curing Methods and Materials

Supplying additional moisture Replaces moisture lost to hydration and evaporation Sealing in mix water

Prevents evaporation losses Accelerating curing Supplying moisture and heat to accelerate strength gain

Ponding and Immersion Ponding dikes around perimeter retain water on surface An ideal method to prevent moisture loss and uniform temperature

Intensive labor and supervision Immersion submerging cast element in water

Most thorough method of curing Commonly used in laboratory settings Fogging and Sprinkling

Wet Coverings Impervious Paper Plastic Sheets Membrane-Forming

Coumpounds Internal Curing Lightweight aggregates or superabsorbent polymers Provide internal moisture source

Counteracts self-desiccation Used in addition to external curing

Not suitable for counteracting evaporation losses Extra drying time needed for moisturesensitive applications Stea m Curin

g Stea m Curin g Forms Left in Place and

Insulation Forms help prevent evaporation losses Exposed surfaces must be protected

Wood forms should be kept moist Insulation maintains temperature during cold weather Can be coupled with formwork

Heated enclosures and hydronic heaters can be used Electrical, Oil, Microwave, and Infrared

Electrical methods: Use concrete as conductor Use reinforcement as conductor

Special wires Electric blankets or heated steel

forms Hot oil, water, or steam circulated in pipes Infrared used on enclosed/covered concrete Curing

Period and Temperature Sealers Summary Curing basics Curing methods and materials

Curing period and temperature Sealing compounds Questio ns ?

Recently Viewed Presentations

  • Biology 100 January 14: Preparation

    Biology 100 January 14: Preparation

    Housecats are pretty easy. They don't belong outside. Period. If you are a responsible cat owner, you don't let your cat outside. Simple as that. (If you need further incentive, a recent study of cats using video cameras found that...
  • HCPSS Teacher Evaluation Framework Focus Groups April 2012

    HCPSS Teacher Evaluation Framework Focus Groups April 2012

    Positive Outcomes. Adapted from New York State District-wide Growth Goal Setting Process - Road Map for Districts. When . SLOs. fully support the goal of increasing student achievement for all students…they have the most impact
  • Matter Summative Project

    Matter Summative Project

    MATTER SUMMATIVE PROJECT. 9-14 DUE 10-1. Please use your notes, Power points, and the hands on examples that we use in class (mason jars, marshmallows, pictures etc.) as resources and starting points to use in your work.
  • Estate Planning: MCLE BasicsPlus! Charitable Planning May 10,

    Estate Planning: MCLE BasicsPlus! Charitable Planning May 10,

    Income Tax. Under § 170 federal income tax charitable deduction available as an itemized deduction subject to certain limits . Estate/Gift Tax. If an organization qualifies for income tax deduction under § 170(c), it also qualifies for gift and estate...
  • Domain Name Service (DNS) Fall 2002 Ch 8-

    Domain Name Service (DNS) Fall 2002 Ch 8-

    The longer name is the canonical hostname, the shorter the alias hostname. Fall 2002 * Ch 8- DNS© Jörg Liebeherr and Magda El Zarki, 2002 DNS Services (cont'd) Mail server aliasing: same as above, aliases can exist for long canonical...
  • Ways of the World - RH

    Ways of the World - RH

    I. Looking Back and Looking Around: The Long History of Pastoral Peoples. The World of Pastoral Societies. Standard features of pastoral societies: generally less productive than agricultural societies,needed large grazing areas, populations much smaller than in agricultural societies, lived in...
  • Understanding Trauma and Its Impact E-Resource Companion Slide

    Understanding Trauma and Its Impact E-Resource Companion Slide

    Even positive experiences like getting married, moving, or starting a new job can cause some level of strain. In many cases, we have the capacity to cope with a range of life experiences, expected or unexpected, mild or intense. In...
  • Catholic Social Teaching in a Digital Age

    Catholic Social Teaching in a Digital Age

    Condition for partnership. Contribution from Catholic Social Teaching - dialogical by nature and methodology . Specific insights - driver of engagement ... Pilgrim Church - journeys with, shares concerns, goes beyond itself. Unity of human family - sons and daughters.