how can i separate the steel from the concrete

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Mean Klean 1 gal Concrete and Mortar Dissolver

Easily remove concrete from your tools and equipment with Mean Klean 22 oz Concrete Mortar Dissolver The advanced liquid formula dissolves and physically breaks down concrete by attacking the Portland cement eventually reducing it to mush that is easy to clean off with a hose or pressure sprayer

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How to Patch a Concrete Floor

Work the trowel in a fanning motion to blend the edges with the existing concrete Do this several times as the mix cures To burnish the surface very smooth use a steel trowel (shown) on the final few passes For a texture pull a damp push broom over the concrete Wait at least 24 hours before walking on the patch and a week before driving

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Visual Inspection of Concrete

Chemically concrete is a complicated material and a visual inspection will not always answer those questions Basic knowledge of concrete mixes installation weathering and the other factors that can affect how it ages in addition to the illustrations and photo examples provided here will give inspectors the best chance of making sound decisions and recommendations to their clients

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Wood on Concrete and Masonary Wood in he Ground Wood

required clearances to ground and concrete or the wood must be treated or decay-resistant It does not ma tte r if the wood is covered with other material such as stucco or brick because other materials can admit moisture that over time can cause decay in untreated wood

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How to Pour a Concrete Sidewalk

Form and pour a new concrete sidewalk the perfect first concrete project for the beginner Replace that ugly cracked walk with a flat smooth new one We show you how to build forms and then place and smooth the wet concrete all with first class results You save big money too If the thought of

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How to Pour Concrete Footings Piers

Sep 27 2019How to pour concrete footings and piers with step-by-step instructions for building a form and ready-made concrete pier options Waxed fiber tubes readily available at home improvement centers and lumberyards make forming and pouring footings and piers a relatively easy job

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Securing bottom plate to concrete block

Jun 21 2001Re Securing bottom plate to concrete block I would use as a minimum 6 x3/8 Expansion bolt - The tapcon Screws are a little Light - You are better off with anchor bolts - The provide the correct resistance to uplift lateral shear* Even if you set your first plate - Bolt it down tight cut the protruding length of bolt down to the height of the Nut

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FAQ Pressure

No barrier membranes are an alternative option for providing additional corrosion resistance in certain applications (there is no requirement to use a barrier) Simpson Strong-Tie still recommends the use of stainless steel fasteners anchors and connectors with treated wood

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Traditional Costruction Methods STEEL FIXING

This expansion bursts the concrete open thus exposing the steel to attack by the weather which increases the corrosion Cover in Hong Kong varies from 20 to 60 mm The actual value depends on the concrete strength and on the location of the concrete such as below the ground or inside a building Steel chair used to separate the top and

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concrete

In the posttensioning process the steel is run through ducts formed in the concrete When the concrete has hardened the steel is anchored to the exterior of the member by some sort of gripping device By applying a measured amount of stretching force to the steel the amount of compression transmitted to the concrete can be carefully regulated

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No lintel above window

Feb 25 2008Small jobbing builder can do this in a day say 300-400 plus VAT incl lintel/bricks/compo depending where you live [/quote] lol at bolting a l shaped lintel to the back of a concrete lintel where are you getting your ideas from some sort of comic diy book? just bed the steel lintel at least 150m either side and the brickwork will hold it in

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Top 16 Mistakes People Make When Installing Concrete

Concrete installation is not nearly as straightforward as it seems There is a wealth of preparation that occurs before a single drop of concrete is ever poured onto the site Everything from the mix design quantity of concrete to purchase site preparation tools weather forecast placement process form removal and curing process need to be Continue reading Top 16 Mistakes People Make

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Securing bottom plate to concrete block

Jun 21 2001Re Securing bottom plate to concrete block I would use as a minimum 6 x3/8 Expansion bolt - The tapcon Screws are a little Light - You are better off with anchor bolts - The provide the correct resistance to uplift lateral shear* Even if you set your first plate - Bolt it down tight cut the protruding length of bolt down to the height of the Nut

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Tips to Build a Concrete Walkway

Build strong crack-free concrete sidewalks and slabs with these 10 pro tips Tips include forming edges leveling smoothing curing and other vital steps in creating a first-rate concrete pour Also the 10 most common mistakes The angled 24 reinforces the side stake that holds the form

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Are there any chemicals that break down cement but not

May 16 2017I have been involved several times in the last 30 or so years where a tradesman has washed cement based grout down a stormwater or sewer drain expecting it to simply disappear never to be seen again Trouble is that it certainly was seen again

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How to Join Two Concrete Slabs

Jul 17 2017Sometimes if the next section is scheduled in a different construction phase months can pass before the nextion section is poured And you can't just pour two slabs next to each other and have them meet the structural requirements of your project you must join the two concrete

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How do you join new concrete to old concrete?

A You can join the new concrete right to the old concrete this is called a concrete construction joint The edge of the existing concrete that was sawed should be drilled and doweled so the new concrete won't separate lift or settle from the old concrete

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How would you separate aluminum cans steel cans soda

Sep 08 2009How would you separate aluminum cans steel cans soda cans milk jugs and salt? We have 1 A long conveyor belt 2 A large tank that can be filled with water 3 Several powerful magnets hanging above the conveyor belt 4 Nets for skimming the tanks and scooping material from the bottoms I need a way to separate the 4 recycled materials

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UFER ground in a new slab?

Jan 15 2010I have an situation with a residential dwelling that just had a new slab poured but the foundation footings were not touched The house already has two correctly installed ground rods that have been properly bonded to gas and water lines but no UFER was installed in the new slab Should the UFER have been installed into the new slab or are the existing grounding rods sufficient?

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Can I separate steel bars embedded in concrete using

Jul 18 2006Can I separate steel bars embedded in concrete using vibration? To re-phrase a question I asked before In my back yard there are some steel bars embedded in concrete from the foundations of an old out-house I want to remove the steel and leave the concrete intact

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Concrete Bonding

The most effective way to ensure that the bonding agent gets into the existing concrete is to apply it directly using a brush or rag It can be sprayed if you happen to have a sprayer Although the directions say that you can use it as part of the mix water direct application works better

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Ways to Recycle and Reuse Concrete

Feb 08 2002There is typically not a problem with galvanized surfaces in contact with concrete for many decades There may be some reactions between the galvanized steel and the concrete during the curing stages if there is an absence of chromate either in the concrete itself or on the galvanized steel

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Concrete Basics in Construction from Construction

It is important that the reinforcing steel have enough concrete cover so that the concrete bonds to the rebars and allows the concrete and steel to act together as a monolithic structural unit The concrete cover also protects the reinforcing steel from excessive moisture or chemical corrosion

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CRSI Reinforced Concrete Terminology

CRIBBING (Also known as DUNNAGE)—Wooden blocks or boards used in a horizontal or vertical position to separate bundles of reinforcing bars CRSI—Concrete Reinforcing Steel Institute CULVERT—Any structure not classified as a bridge which provides a waterway or other opening under a road or highway

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Shear Key in Construction Purpose Functions and Uses

Shear key can be constructed from concrete as in precast constructions residential building basement or manufactured from steel such as in the case of steel column base plate and sometimes steel reinforcement is used to play shear key role for instance between basement wall and footing

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Concrete Exam Flashcards

Concrete can contribute credit in how many categories in LEED for New Construction and Major Renovations ____ consists of tensioning steel in the forms prior to placing the concrete and cutting the stressed steel after the concrete hardens Concrete should be workable but the ingredients should not separate during transport and handling

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CORROSION OF CONCRETE REINFORCEMENT

Dec 23 2015Corrosion of Concrete Reinforcement Corrosion is a chemical process of destruction of material because of its reaction with the environmental conditions The most predominant among various factors of corrosion is the atmospheric corrosion which causes the rusting of steel Appreciable corrosion only starts when the relative humidity of the air exceeds around 65% In dry

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No lintel above window

Feb 25 2008Small jobbing builder can do this in a day say 300-400 plus VAT incl lintel/bricks/compo depending where you live [/quote] lol at bolting a l shaped lintel to the back of a concrete lintel where are you getting your ideas from some sort of comic diy book? just bed the steel lintel at least 150m either side and the brickwork will hold it in

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Placing New Concrete Over Old

Apr 25 2016If done properly new concrete can often be poured right over an existing slab For this to be feasible the contractor needs to pour at least 2 inches thick use smaller aggregate and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete Steel rebar is also a good idea if the slab is thick enough to allow it

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Design of Steel

concrete joints in vertical position e g beam to column or to wall connections and horizontal ones base plates The behaviour of components in terms of resistance stiffness and deformation capacity is summed up for components in concrete and steel parts header studs stirrups concrete in compression concrete panel in shear steel

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