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.
GET A QUOTECIP 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?
GET A QUOTEany 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…
GET A QUOTEAir 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
GET A QUOTETesting 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
GET A QUOTEcement 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
GET A QUOTENRMCA 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
GET A QUOTEConcrete In Practice (CIP) - NRMCA
GET A QUOTEA 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
GET A QUOTEPumping 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 …
GET A QUOTETesting 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
GET A QUOTEcement 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
GET A QUOTEConcrete 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
GET A QUOTENRMCA 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
GET A QUOTEThe 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.
GET A QUOTE5. 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
GET A QUOTETarget 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
GET A QUOTEWWW. 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
GET A QUOTEspecification 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
GET A QUOTEOct 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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