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Thursday 10 October 2013

Volume: 1, Number: 4, July - September 2013


 


              * Cement  Manufacturing

    
                    * Concrete,  Mineral  & Chemical  Admixtures

       

                       * Teaching, Training and Research
          
         
                     * Trade and Industry





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URL: http://www.drjdbapat.com
Feedback: (1) consult@drjdbapat.com 
(2) jdbapat@yahoo.co.in

This e-bulletin is published to share views on the subjects mentioned as above.      Dr J D Bapat may not necessarily be in agreement with the views expressed by experts or quoted in links. The products and services are mentioned only to create an awareness, the quality and other aspects should be verified by the buyers/users; quote the reference number when you contact the suppliers. Visit the URL and see title 'Bulletin - Cement & Concrete' for the objective and other editorial details.

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Cement Manufacturing


(a) Ball Mill Internals

The internals of a ball mill can be divided in 4 groups: - Head liners - Shell linings - Diaphragms - Grinding media This article will review each group and especially those who have a direct impact on the grinding efficiency. Today, the Feed Head Liners and the 1st Chamber Linings. Read More.

(b) Pollution-Killing Cement

The proprietary technology involves mixing the particles of titanium oxide within white or grey cement, but apparently it can be used with all other varieties of concrete, including plaster and mortar. Read more. 

(c) Crack-Proof Cement by CEMEX
The new cement is especially designed at the molecular level to reduce cracking due to plastic contraction by up to 80%, during the curing periods for concrete and mortars. It also creates a more manageable mix, with better integration and cohesion. Read more.


Concrete, Mineral and Chemical Admixtures


(a) Home-Made Binder Recipe 


Researchers in Michel Barsoum’s group at Drexel University have been cooking up this seemingly new technology over the last several years. Read more.

(b) Concrete Recycling Robot
The conceptual robot makes it possible to intelligently deconstruct a building, without any of the fuss or mess. Read more.

(c) Recycled Concrete Green Concrete

Water in the rainwater ponds can be very rich in phosphorus, and if it is discharged into a lake, it can lead to an increase in algae growth. That can lead to oxygen depletion and a reduction in the number of species that can live in the water. By letting the pond water pass through a filter of crushed concrete, up to 90 per cent of the phosphorus can be removed. Read more.

(d) Concrete-Composite Offshore Floating Wind Turbine
The first offshore floating wind turbine has been deployed off the coast of Brewer, Maine. The project, overseen by the University of Maine’s Advanced Structures and Composites Center, is an early attempt to harness some of the strong offshore winds and paves the way for wind farms to be set up 50 miles off the coast where the winds are strong and consistent. Backers of offshore wind turbines believe they can harvest 5 gigawatts of power by 2030. Read more.


(e) Limestone Powder Enhances Performance of 'Green' Concrete
Adding limestone powder to "green" concrete mixtures—those containing substantial amounts of fly ash, a byproduct of coal-burning power plants—can significantly improve performance, report researchers from the US, National Institute of Standards and Technology (NIST) and the Federal Highway Administration (FHWA). Readmore.


(f) A Case for Front-Discharge RMC Mixers
Time is money, and that’s the essence of a front-discharge mixer. It drives right up to where concrete’s needed and, after the driver adds chute extensions, starts offloading. For ready mix fleets, the fast operation sometimes enables a truck to do one extra load a day, which adds to revenue and profit. But rear-discharge mixers cost less to buy and, some say, to maintain. Read more.


(g) First Luxury net Zero Energy Home
Marc Rutenberg, the CEO of the Florida company Marc Rutenberg Homes, has recently successfully designed and built a luxury home that complies with and even surpasses all Energy Star standards and is LEED Platinum certified. The Castaway III, as the house is called, measures 4,552-square feet, which is about 3,100 square feet larger than the average zero-energy home. This house proves that there is no need to sacrifice comfort and luxury to reduce one’s carbon footprint. Read more.


(h) Cement-free Concrete
The University of Queensland Global Change Institute, Australia, have taken environmentally sustainable design a step further and precast world-first geopolymer concrete floor panels which, with significantly lower embodied energy, helps to reduce the building’s carbon footprint. Readmore.

Books



(a) Mineral Admixtures in Cement and Concrete, Author: Jayant D. Bapat, CRC Press, Taylor & Francis Group 
Written for engineers, this book focuses on how to make more workable and durable concrete using mineral admixtures. For each mineral admixture, the book looks at manufacturing and processing, physical characteristics, chemical and mineralogical composition, quality control, and reported experiences. It also examines the provisions of national standards on the admixture’s addition to cement and concrete. Offering a deeper understanding of mineral admixtures, it encourages engineers to more effectively use these and other wastes in cement and concrete to support more sustainable growth of the cement and construction industry. Read More.

(b) ACI 522.1-13 Specification for Pervious Concrete Pavement
This Specification covers materials, preparation, forming, placing, finishing, jointing, curing, and quality control of pervious concrete pavement. Provisions governing testing, evaluation, and acceptance of pervious concrete pavement are included. ReadMore.

(c) ACI 228.2R-13: Report on Nondestructive Test Methods for Evaluation of Concrete in Structures

A review is presented of nondestructive test (NDT) methods for evaluating the condition of concrete and steel reinforcement in structures. Read More. 

(d) ACI 229 R-13 Report on Controlled Low Strength Materials

Controlled low-strength material (CLSM) is a self-consolidating cementitious material used primarily as a backfill as an alternative to compacted fill. This report contains information on applications; materials; properties; proportioning; mixing, transporting, and placing; quality control; and low-density CLSM using preformed foam. Read More.
(e) 515.2R-13: ACI Guide to Selecting Protective Treatments for Concrete
Concrete structures can be subjected to physical or chemical attacks by various substances, including water, acids, alkalis, salt solutions, and organic chemicals. Damage may vary in intensity from surface discoloration or roughening to catastrophic loss of structural integrity due to acid attack. This guide addresses the effects of various substances on untreated concrete and provides recommendations for protective treatments. Read more.

(f) SP-17(11): ACI Reinforced Concrete Design Manual
Published in two volumes and provides design and analysis in accordance with ACI 318-11.
Information is presented in three sections:Explanatory Material, Design Examples and, Design Aids. Read more. 

Teaching, Training and Research

(a) ACI e-Learning

Fiber-Reinforce Concrete: Three new ACI learning courses. Read More.


(b) Pervious Concrete Update
The newly revised Pervious Concrete Research Compilation is now available from the Ready Mixed Concrete (RMC) Research and Education Foundation. Read More.

(c) Tablet Buying Guide. Read online.


Downloads 

(a) 
The American Concrete Institute (ACI) has  posted two videos related to portland-limestone cements on its YouTube channel. Download – 1 and Download - 2


(b) Tips to buy a digital camera. Download.


(c) Make-Money-from-Home-Scams. Download.


(d) This new report ranks America's 34 largest cities on what they are doing to save energy and costs in five key areas. Download.


(e) Travel smart with Google Maps. Download.


(f) Guidelines on safe use concrete pump by British Concrete Pumping Interest Group (BCPIG). Download. 


Discussions

(a) Optimising the dosage of superplasticiser. Follow this Linkedin discussion.



(b) Training needs of professionals in cement, concrete and construction industry. Participate in this Linkedin discussion.

(c) How to prevent thermal cracks in mass pouring of concrete. Participate in this Linkedin discussion. 


(d) Effect of pumping on concrete air-void content. Participate in this Linkedin discussion.


(e) Avoiding shrinkage cracks in concrete. Participate in this Linkedin discussion. 


(f) Assessing the quality of chemical admixture. participate in this Linkedin disacussion. 


(g) Cellular concrete. Participate in this Linkedin discussion.


Events

(a) Dr J D Bapat organised a training programme on "Durable Concrete with Mineral Admixtures", on 24-25 September 2013, under the aegis of iKnowledge Malaysia. View the content, proceedings, photo album and download the brochure here.


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