7×24 Hours Service
Why 2000 YearOld Roman Concrete Is So Much Better Than What We Produce Today SIGNE DEAN 4 JULY 2017 One of the fascinating mysteries of Ancient Rome is the impressive longevity of some of their concrete harbour structures Battered by sea waves for 2000 years these things are still around while our modern concoctions erode over mere
Send Email:[email protected]
Chat Online Contact Us
Oct 08 2020018332Wash the old concrete with a pressure washer Take a pressure washer and use a back and forth sweeping motion to spray and clean the concrete Work in sections and be sure to clean every bit of the concrete and wash off the acid mixture You can rent a pressure washer from home improvement stores if you dont own one3976
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 wont separate lift or settle from the old concrete3438
If the new concrete is 3 inches thick or more you dont have to bond the new concrete to the old concrete If the new concrete is less than 3 inches thick you will want to use a bonding agent to bond the new concrete to the old concrete Make sure the old concrete is clean wash it or vacuum it dont pour over any dirt dust debris or4710
Dampen old concrete slightly before applying the cement paint Cover the overlay with plastic to cure it for 48 hours DEAR TIM My concrete sidewalks and driveway look horrible For some reason the top 18 to 14 inch of the finish surface has peeled up in patches4506
Nov 25 2019018332Contact your local government and ask if they will accept your old concrete to be recycled Look online or call your local government to find out if they have a concrete recycling program Some programs may even come to you and pick up your old concrete3744
Use an old scrub brush to brush the concrete patch rinse with plenty of clear water and allow it to dry The acid will wash off the gray cement paste from the sand on your new patch allowing you to see the color of the sand grains4170
May 30 2019018332This is especially important since a large number of structures were built using reinforced concrete between the 1950s and 1970s especially in bridges In North America the average age of the continents 607380 bridges currently in operation is 42 years old with some of these structures as old4695
HomeAdvisor is the simplest way to find and book concrete removal services near you Connect with the best concrete removal contractors in your area who are experts in residential projects like rmeoving concrete slabs Read millions of reviews and get information about project costs4335
The completed backyard DIY smokehouse made of of concrete blocks Photo by Matt Gilara Building the layers of blocks up Photo by Matt Gilara Framing and attaching the door Photo by Matt Gilara Squaring up the first few layers of cement blocks Photo by Matt Gilara3684
Properties of Concrete Concrete is an artificial conglomerate stone made essentially of Portland cement water and aggregates Properties of Concrete While cement in one form or another has been around for centuries the type we use was invented in 1824 in Britain It4029
Jun 29 2018018332Having old or excessive concrete on a project site can delay the completion of those projects Most people think that either working around it or disposing of it are the only options However trying to work with old concrete can lead to disasters and disposing of4918
Concrete Recycling in Athens on YPcom See reviews photos directions phone numbers and more for the best Concrete Aggregates in Athens GA3162
May 12 2020018332Spritz the old concrete with a little water to make it damp before applying the cement paint Its important to immediately cover the wet cement paint with the stucco mix Concrete3445
Placement of new concrete over old concrete shall be conducted according to a preplanned procedure in order to achieve desired final product For instance clean old concrete fix forms install steel bars or mesh if necessary pour concretecompact and finish concrete and finally cure the newly placed concrete4847
Capable of recycling and processing almost any material including CampD waste asphalt concrete with rebar natural rock glass coal slag and more Extremely Powerful Dieseloverelectric drive system lowers fuel consumption up to 30 without sacrificing performance or throughput3524
Jul 01 20190183321 Introduction People often use metaphors to reason about abstract concepts According to cognitive linguistic theories Lakoff and Johnson 1999 Gibbs 1996 metaphor is essentially a set of ontological correspondences aka mappings between an abstract and a concrete conceptual domainsAccording to processing models these mappings are retrieved or constructed in real time4161
The very best way to fix concrete steps is to demolish the old ones and pour new ones No repair lasts forever And replacement is the only real fix for steps that are sinking or have deep cracks But if your steps are level and have only the usual damage that goes a few inches deep you can save yourself a ton of money andor labor by patching3849
Dec 15 2001018332Youll find a lot of useful information in two ACI reports quotConcrete Repair Guidequot ACI 546 and quotGuide for Concrete Floor and Slab Constructionquot ACI 3021 ACI 3021 provides steps for proper preparation of the subgrade They are available from ACI American Concrete Institute by contacting wwwaciintorg or calling 24884837003054
Concrete is cast around but not in contact with unstretched steel In many cases ducts are formed in the concrete unit using thin walled steel forms Once the concrete has hardened to the required strength the steel tendons are inserted and stretched against the ends of the unit and anchored off externally placing the concrete into compression3523
Old concrete that has crumbled making dust and small bits of concrete cannot be repaired You have to hire a contractor to replace the old concrete Its a big job Heres what to do Clean the area Use a wire brush on the concrete and the edge you want to refasten to get rid of any particles that might impede bonding3261
concrete should have a low water cement ratio wc not to exceed 040 When bonding fresh concrete containing latex polymer admixtures check compatibility of the latex modified concrete mixture by either installing a test patch and performing a pulloff test in an independent concrete testing laboratory 34229
Nov 16 2018018332The above information comes from an article in The Old House Journal For more detailed information read the full article here At the same time construction with decorative concrete blocks was booming Thomas Edison was experimenting with building concrete houses from a single molding operation This process turned out to be a failure3648
Nov 16 2020018332Recycling of concrete debris can make a contribution to reducing the total environmental impact of the building sector 7 8 a Demol iti on of old st ruc ture b of the existing4561
Featured Product FloCoat174 Concrete Resurfacer PREPARATION For a successful concrete resurfacing project proper surface preparation is critical Use only when the product air and surface temperatures are above 50 0 F for a minimum of 24 hours The3192
The Single-Cylinder Cone Crusher is widely used for medium, fine and superfine crushing operation of mine, aggregate, metal ores, limestone, granite, basalt, river gravel, construction waste, steel slag, cement raw material, ceramic raw materials.
The coal ash dryer made by our company, as the Chinese leading raw coal drying machine supplier, is specialized in drying the coal ash and then makes new use of it.
Mobile crusher is the machine that has crusher, feeder, feeding hopper, belt, driving and controlling systems on mobile chassis.
Jaw crusher machine, also named jaw crusher for short, is the earliest crusher.
Briquette machine is also called briquetting press machine, briquetting machine or pressure ball machine.
VSI sand maker, also called VSI crusher, is the major machine for sand making plant. During the crushing process of sand making machine, raw materials hit each other and not hit any metal parts.
Sand washing machine is a kind of high-efficient machine, which is produced by fote according to the actual situations of sand industry around the world.
Flotation cell, also named as flotation machine, is of great importance for ore separation. The flotation effect can be influenced by the factors of ore particles, ore pulp or drug.