Loss of air content in pumped concrete NRMCA Publication

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  • Concrete In Practice (CIP) - Resources - Andale Ready Mix

    The CIP's are courtesy of National Ready Mixed Concrete Association (NRMCA), Silver Spring, Maryland, USA. Documents are read only and may not be printed. Print versions can be ordered directly through NRMCA by email at [email protected] or phone (301) 587-1400 ext. 1165.

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  • CIP 21 - Loss of Air Content in Pumped Concrete

    CIP 21 - Loss of Air Content in Pumped Concrete (Pkg. of 50) Concrete in Practice Sheets are short one-page discussions on various concrete topics. Written in a "What?

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  • Controlled Low Strength Material (CLSM) in - nrmca.org

    any loss or damage arising from reliance on or use of any content or principles • ©2015 National Ready Mixed Concrete Association. 5. Instructions • CLSM with high entrained-air contents can be pumped…

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  • Home - Concrete Materials

    Air content ofstructural lightweight concrete must be closely and cause slump loss that may result in plugging of the pump line and difficulties in placement and finishing National Ready Mixed Concrete Association 900 Spring Street, Silver Spring, MD 20910 .nrmca.org 888-84NRMCA

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  • NRMC CIP 09p - Scribd

    Testing Series - 10 Topics TC Jobsite Addition of Water CIP 26 Discrepancies in Yield CIP 8 Loss of Air Content In Pumped Concrete CIP 21 Acceptance Testing of Concrete CIP 41 Making Concrete Cylinders in the Field CIP 34 Testing Compressive Strength of Concrete CIP 35 Low Concrete Cylinder Strength CIP 9 Strength of In-Place Concrete CIP 10 Flexural Strength of Concrete CIP 16 Concrete

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  • CIP 15 - Chemical Admixtures for Concrete

    cement content concretes, entrained air will reduce strength by about 5% for each 1% of air added; but in low cement content concretes, adding air has less ef-fect and may even cause a modest increased strength due to the reduced water demand for required slump. Air entraining admixtures for use in concrete should meet the requirements of ASTM

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  • NRMCA Concrete Practice - Concrete & Aggregate Products

    NRMCA Concrete Practice. Dusting Concrete Surfaces. CIP 1. Scaling Concrete Surfaces. CIP 2. Crazing Concrete Surfaces. CIP 3. Cracking Concrete Surfaces. Loss of Air Content in Pumped Concrete. CIP 21. Grout. CIP 22. Discoloration. CIP 23. Synthetic Fibers for Concrete. CIP 24. Corrosion of Steel in Concrete. CIP 25. Job Site Addition of

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  • Loss of Air Content in Pumped Concrete — What, why, & how

    Concrete In Practice (CIP) - NRMCA

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  • Mix Design and Pumped Concrete - Civil Engineering Portal

    A loss of slump during pumping is normal and should be taken into consideration when proportioning the concrete mixes. A slump loss of 25 mm per 300 meters of conduit length is not unusual, the amount depending upon ambient temperature, length of line, pressure used to move the concrete, moisture content of aggregate at the time of mixing

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  • Volume 19/Number 1 Control of Air Content in Concrete

    Pumping Reduction in air content Use loop in descending ranges from 2 to 3%. pump line. Keep the pumping pressure as on Control of Air Content in Concrete (EB116), published in 1998 by NRMCA and PCA. The document presents practi-cal information on achieving and con-trolling target air …

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  • NRMC CIP 09p - Scribd

    Testing Series - 10 Topics TC Jobsite Addition of Water CIP 26 Discrepancies in Yield CIP 8 Loss of Air Content In Pumped Concrete CIP 21 Acceptance Testing of Concrete CIP 41 Making Concrete Cylinders in the Field CIP 34 Testing Compressive Strength of Concrete CIP 35 Low Concrete Cylinder Strength CIP 9 Strength of In-Place Concrete CIP 10 Flexural Strength of Concrete CIP 16 Concrete

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  • CIP 15 - Chemical Admixtures for Concrete

    cement content concretes, entrained air will reduce strength by about 5% for each 1% of air added; but in low cement content concretes, adding air has less ef-fect and may even cause a modest increased strength due to the reduced water demand for required slump. Air entraining admixtures for use in concrete should meet the requirements of ASTM

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  • Concrete in Practice

    Concrete In Practice, a series of informational articles provided by the National Ready Mix Concrete Association (NRMCA), are written in a non-technical "What, Why and How?" format. Over the years, this material has become a "go-to" resource for many contractors, finishers and specifiers. CIP 21: Loss of Air Content In Pumped Concrete. Read

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  • Technical Resources - MemberClicks

    NRMCA CONCRETE IN PRACTICE (CIP) RESOURCE. CIP 21 - Loss of Air Content in Pumped Concrete. CIP 22 - Grout CIP 23 - Discoloration CIP 24 - Synthetic Fibers for Concrete CIP 25 - Corrosion of Steel in Concrete CIP 26 - Jobsite Addition of Water CIP 27 - Cold Weather Concreting

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  • Concrete In Practice - Carolinas Ready Mixed Concrete

    The CIP's are a courtesy of the National Ready Mixed Concrete Association, located in Silver Spring, Maryland. To purchase them individual CIP's or an entire series click here, email [email protected], or call 888-846-7622 x1165. Click on any of the links below to open up the sheets as PDFs.

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  • (PDF) Basic Concrete Technology What is Concrete?

    5. Importance of Water. For a given set of materials, the strength of concrete depends solely. on the amount of water for a given amount of cement. 6. Damaging Effects of Adding W ater. Higher w

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  • CIP 31 - Ordering Ready Mixed Concrete

    Target air content depends on the size of the coarse aggregate and the typical range is 4 to 6% of An example is pumping concrete in place. • When a job uses more than one type of concrete mixture, it is the Ready Mixed Concrete, Richard D. Gaynor, NRMCA Publication 186, NRMCA, Silver Spring, MD. 3. Guide for Measuring, Mixing

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  • Code and Standards Requirements For Acceptance Testing

    WWW. NRMCA.ORG Scope of Testing • Samples obtained in accordance with ASTM C172 • Point of delivery from transportation unit (or mixer) • Other sampling methods should be defined • Fresh Concrete tests • Slump or slump flow – tolerances in ASTM C94; ACI 117 • Air content – tolerance ±1.5% • Temperature – limits in specifications • Density – typically no limits unless

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  • CONCRETE 101

    specification requirements which require a specific amount of air content at the point of placement or at the discharge end of the pumping. Air loss can be minimized when pumping by slowing down the "free-fall" of the concrete and minimizing the pumping pressure. American Concrete Pumping Association . 606 Enterprise Dr. Lewis Center

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  • Loss of Air Content in Pumped Concrete

    Oct 01, 1992 · The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete …

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