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Case Histories | Construction & Demolition Recycling Association
Recycled Concrete Aggregate Ready Mix Used in Structural Applications. In 2008, ReCrete Materials, Inc. of Arvada, Colo. provided approximately 7,900 cubic yards of ready mixed concrete containing recycled concrete aggregate for use in foundations and tilt-up panels at the Enterprise Park at Stapleton project in Denver, Colo.
Making the connection - Construction & Demolition Recycling
To build and add new ramps, K-Five needed to first demolish the concrete before building the ramps at 147th Street down from the overpass onto I-57. They tore up the concrete using their RX6 breaker from Chicago Pneumatic (CP), which would prove to have a major presence on the job site. HARD HITTERS
Making concrete green: reinventing the world's most used
Mar 03, 2016 · Making concrete green: reinventing the world's most used synthetic material ... 80% aggregates (such as gravel and sand), and 7% water. ... there are steps to make even Portland-based concrete ...
What is a Concrete Aggregate? (with pictures)
2020/4/4 · Concrete aggregate is a material which is mixed with cement to create concrete which is hard, strong, and long-lasting. There are a number of different types of concrete aggregate, with contractors selecting their aggregate on the basis of the type of job being ...
Recycling Construction Materials
As most contractors already know, construction and demolition (C&D) materials are those items left over at a construction, renovation or demolition site. The most common materials are concrete, wood, drywall, asphalt shingles, asphalt pavement, metal and cardboard. These materials typically make up 70 to 95 percent of the discarded material at ...
How Concrete is Made - Portland Cement Association
In its simplest form, concrete is a mixture of paste and aggregates, or rocks. The paste, composed of portland cement and water, coats the surface of the fine (small) and coarse (larger) aggregates. Through a chemical reaction called ...
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Concrete aggregate collected from demolition sites is put through a crushing machine. Crushing facilities accept only uncontaminated concrete, which must be free of trash, wood, paper and other such materials. Metals such as rebar are accepted, since they can be removed with magnets and other sorting devices and melted down for recycling elsewhere.
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Underpinning to Repair Faulty Foundations
Start underpinning under a strip of footing. It is recommended to start with at least 3 feet long, two feet wide and two feet in depth. After the excavation has been completed, add concrete to the cavity. Concrete should be mixed using one part cement, three parts sand, and six parts aggregates. Remember to use formwork on the edges.
Batching, Mixing, Transporting, and Handling Concrete, Chapter 10
Batching, Mixing, Transporting, and Handling Concrete percentages of accuracy: cementitious material ±1%, aggregates ± 2%, water ±1%, and admixtures ± 3%. Equipment should be capable of measuring quanti-ties within these tolerances for the smallest
Construction & Demolition Waste: 14 Facts That Will Blow Your
Jan 31, 2019 · It’s time to make a change. Keep reading to learn more about C&D waste and how you can better manage your waste. Examples of Construction & Demolition Waste. C&D materials are wide ranging depending on the project and can consist of any or all of the following: Bricks and masonry Concrete Wood
How to use Glass as Aggregate in Concrete
Glass aggregate can replace part or all of the sand and gravel in concrete, for effects that range from colorful terrazzo, to granite- or marble-like finishes, to concrete that reflects light like a mirror. Glass aggregate can even be used to produce concrete that literally
20 Things You Can Do Without Planning Permission
Read on for a list of 20 popular home improvement projects that you can do without planning permission. When Do I Need Planning Permission? If you are building from scratch, planning a large extension or making improvements to a listed building (or a property in a AONB, or other specially designated area) then you will need planning permission.
Alternative Concrete Demolition Techniques
Concrete contractors dream about placing perfect concrete for precisely positioned columns, beams, and slabs. But sometimes things aren’t quite perfect or plans change and it’s necessary to demolish concrete. In many cases, a 60-pound breaker or a smaller ...
Aggregates - Types of Aggregates | Coarse Aggregate, Fine
Aggregates Definition: Aggregates are coarse particulate rock-like material consisting of a collection of particles ranging in size from < 0.1 mm to > 50 mm. It includes gravel, crushed rock, sand, recycled concrete, slag, and synthetic aggregate. Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a ...
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Recycled construction and demolition concrete waste
Recycled construction and demolition concrete waste as aggregate for structural concrete Author links open overlay panel Ashraf M. Wagih a Hossam Z. El-Karmoty b Magda Ebid c Samir H. Okba d Show more ...
The Importance of Concrete Recycling
Dec 29, 2017 · Construction and demolition (C&D) waste is a central component of the solid waste stream, amounting to roughly 25 percent of total solid waste nationally. The largest part of C&D material is concrete, which encompasses around 70 percent of C&D generated material before recycling, according to the U.S. EPA. Construction (21.7 million tons) and demolition (353.6 million tons) activities ...
Aggregate in Concrete
Find Manufacturers: Admixtures Aggregates are generally thought of as inert filler within a concrete mix. But a closer look reveals the major role and influence aggregate plays in the properties of both fresh and hardened concrete. Changes in gradation, maximum ...
Construction and Demolition Aggregate Recycling Facilities
Aggregate Processing Facilities. This page is intended to help contractors identify processing facilities that accept asphalt, brick, and concrete (ABC) resulting from the construction and demolition of buildings, highways, and bridges.
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COMPACTION OF CONCRETE – PURPOSE, PROCESS & EFFECT
The larger the aggregate, the greater the effort required, while angular aggregates will require greater effort than smooth or rounded aggregates. 3.2 Effect on Hardened Concrete Fig-2 Loss of strength through incomplete compaction
Concrete Basics in Construction from Construction Knowledge.net
The basics of making the cylinders should be understood by the Construction Supervisor. When the wet concrete is being placed, cylinders 6” in diameter and 12” high are filled with concrete and carefully consolidated, (see Making Concrete Cylinders for Testing).
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How to Properly Mix Concrete — The Family Handyman
Work it to the perfect concrete mix ratio. If the mixed concrete looks like the mix in step 8, it's ready to pour. Otherwise, mix in additional dry mix or water until you get the right consistency. It's tempting to just squirt water into the dry concrete mix with a hose and mix up a soupy batch of concrete.
Concrete Repair Solutions and Services
Fosroc believes that concrete should be built to last – our high quality protective systems and repair materials can prolong the life of a structure way beyond its original design life. Every penny spent on improving concrete quality, protection and enhancement pays off in the long term, reducing the need to demolish and rebuild structures ...
EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON CONCRETE
EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON CONCRETE STRENGTH AND FRACTURE ENERGY By Rozalija Kozul David Darwin A Report on Research Sponsored by THE NATIONAL SCIENCE FOUNDATION Research Grants No. MSS
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RoadStar Mini 4-9TPH
The RoadStar Mini is a single road towable asphalt batch mixing plant which is ideal for small paving & patching jobs, producing 4-9TPH of asphalt.
The SpotMix is twin axled with up to twice the output of the RoadStar Mini, making it suitable for larger patching projects
Compact and highly mobile, the Super-Roadmix fulfils all the requirements of a truly mobile asphalt plant.
Mounted on a single chassis are all the components necessary to repeatedly and reliably deliver 30, 60 or 90 TPH of high quality asphalt products.
RoadStar 500 / 1000 40-80TPH
The two chassis design of the RoadStar 500 & 1000 offers a high degree of mobility and allows the plant to be relocated quickly and easily, with minimum foundations or site preparation, making it ideal for island work, urban development or general road maintenance.
RoadStar 1500 / 2000 / 3000 120-240TPH
With outputs ranging from 120 to 240TPH, the three chassis design of the RoadStar 1500, 2000 & 3000 models offers a high degree of mobility and allows any plant to be relocated quickly and easily, with minimum foundations or site preparation.
The Parker DrumStar range is an economical and highly portable alternative to batch plants, offering contractors the ability to move quickly and easily from job-site to job-site while maintaining consistent high levels of quality asphalt production.
A choice of four models are available with capacities ranging from 75 to 200TPH; the chassis of the two smaller models is designed to be unbolted for transport across the world within standard containers.
Containerised C500 / C750 / C1000 40-80TPH
The Containerised series has been designed to fit into standard shipping containers to provide low cost transportation by road, rail or sea to remote locations. Modular and compact the series offers three sizes producing 40, 60 and 80 tonnes per hour. On completion of a contract the plant can be reloaded into its containers for security to await transport to the next location.
The TransMix series has been primarily designed for markets that require high specification and high output asphalt plants with ease of transportation over large overland distances . The low-level TransMix has been designed to be free standing to alleviate the need for costly foundations and rapid installation can be achieved with its modular design.
The modular concept of the StarBatch range is designed to offer contractors a plant that is easy to transport, easy to erect and easy to dismantle, having the ability to reliably produce quality asphalt for use in more remote locations on either short or long term contracts while at the same time maintaining many of the benefits of a traditional tower plant. Capacities from 80 to 200TPH.
Meeting all the criteria for a high performance and environmental plant, the Parker StarMix is able to provide major asphalt production facilities and can draw on an extensive range of options and configurations to choose from.
Specific and exacting requirements of individual clients are able to be met in full in this high-end market sector with outputs ranging from 240 to 400TPH.
The StarMix High Level can optionally be sheeted and clad to customers' requirements, making the plant suitable for environmentally sensitive locations.
We offer a vast range of additional equipment to enhance the productivity size and flexibility of our customers' asphalt plants