Best answer

vapour barrierA vapour barrier is a plastic membrane laid under the slab to improve its performance against rising damp.

It is also called a 'moisture barrier' because it stops the moisture from the soil migrating into the concrete slab..

Answered by: sakra Date created: Jun 24, 2022

What is normal concrete cracking?

Asked By: BuddyJoe Date created: Jun 15, 2022

Probably the single most common reason for early cracks in concrete is plastic shrinkage. When the concrete is still in its plastic state (before hardening), it is full of water. This water takes up space and makes the slab a certain size. As the slab loses moisture while curing it gets a bit smaller.

Answered By: Shubham Chaudhary Date created: Jun 17, 2022

What is the difference between plastic cement and Portland cement?

Asked By: Lennart Regebro Date created: Jun 09, 2022

The difference between portland cement and plastic cement is minute. Plastic cement is a portland cement but the difference is in the addition of material introduced in the finish grind. Normally a plastic cement will include the addition of air entraining agents or other additives in the process.

Answered By: Aakash Date created: Jun 11, 2022

What happens when cement hardens?

Asked By: Mahesh Jamdade Date created: Jun 08, 2022

The water causes the hardening of concrete through a process called hydration. Hydration is a chemical reaction in which the major compounds in cement form chemical bonds with water molecules and become hydrates or hydration products.

Answered By: David M Date created: Jun 11, 2022

Should you cover concrete with plastic?

Asked By: Luis Mendo Date created: Jun 17, 2022

Plastic Sheeting Can Permanently Discolor Concrete. Adverse weather conditions such as rain, snow, or freezing temperatures often make it necessary to protect concrete by covering it. ... That's what makes curing concrete with plastic so effective: the plastic keeps the concrete damp.

Answered By: DigitalRoss Date created: Jun 17, 2022

Is plastic cement waterproof?

Asked By: Grzegorz Żur Date created: Jun 12, 2022

RE: Plastic cement waterproof? Yup, it's pretty waterproof. I've used Testor's cement for a while now without any problems, the cement actually softens the styrene and sort of enables the parts to be "welded" together from what I've seen.

Answered By: Nolan H Date created: Jun 13, 2022

What is plastic roof cement used for?

Asked By: sampathsris Date created: Jun 09, 2022

Rust-Oleum® Plastic Roof Cement is a fibered, asphalt based cement used to install, repair or rebuild roof flashings at parapet walls, gravel stops, stacks, vents, monitors and similar applications. It is ideal for use with fiberglass or polyester fabric or roll roofing for permanent repairs.

Answered By: Basil Bourque Date created: Jun 12, 2022

How can you tell if a concrete floor is dry?

Asked By: Obsidian Age Date created: Jun 23, 2022

To use this method, ASTM D 4263, “Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method,” a plastic sheet is tightly taped to the concrete. After 72 hours, a humidity reading is taken under the plastic with a dew point hygrometer.

Answered By: tacoshy Date created: Jun 26, 2022

Can I use plastic cement on resin?

Asked By: rixo Date created: Jun 10, 2022

Just do NOT use 'plastic cement' or "liquid cement." This is designed for plastic models, not resin.

It works by partially dissolving the plastic so the parts will fuse together.

Resin does not dissolve so 'plastic cement' will have no effect on it..

Answered By: Kirill Rakhman Date created: Jun 12, 2022

Can you use plastic cement on resin?

Asked By: hpique Date created: Jun 23, 2022

Just do NOT use 'plastic cement' or "liquid cement." This is designed for plastic models, not resin. It works by partially dissolving the plastic so the parts will fuse together. Resin does not dissolve so 'plastic cement' will have no effect on it.

Answered By: Casebash Date created: Jun 23, 2022

Does concrete shrink over time?

Asked By: Inian Date created: Jun 25, 2022

If the volume reduction occurs before the concrete hardens, it is called plastic shrinkage. The volume reduction that occurs primarily due to moisture loss after the concrete has hardened is known as drying shrinkage. It is possible for such concrete to shrink without the loss of any water to the environment.

Answered By: Radesh Date created: Jun 28, 2022

Related Question Answers

Hooked

Professor

How do you keep water from seeping on concrete floor?

Plastic drainage mats, or dimple mats, allow air to circulate under the flooring and provide a moisture barrier.

They also provide an insulating layer of air that separates the floor from cold concrete, reducing the potential for moisture damage from condensation or water vapor migrating through the concrete..

Rinto George

Professor

How do you polish a small concrete area?

A small section of concrete can be polished with a hand sander.Vacuum the area thoroughly to remove all dust and debris. ... Cover any vents and under doorways with plastic sheeting and low-tack painter's tape. ... Attach the appropriate sanding disk to the handheld grinder.More items...

Richard Smith

Professor

Does concrete stop radon?

Remember that even several inches of concrete cannot stop radon. Some builders believe that the plastic vapor barrier under the slab will stop radon. Although it is a part of the "radon resistant" construction, it merely reduces the flow of soil gas.

Musa

Professor

What is a concrete ditch called?

A culvert is a structure that allows water to flow under a road, railroad, trail, or similar obstruction from one side to the other. Typically embedded so as to be surrounded by soil, a culvert may be made from a pipe, reinforced concrete or other material.

d-coder

Professor

Can you use regular PVC cement on conduit?

PVC Cement The "glue" used to join rigid PVC conduit and fittings is officially called PVC solvent cement. It comes in a small metal can with a twist-off cap, and is the same material used to join PVC plastic plumbing pipes and fittings. ... Avoid these, and buy one that is intended for use with PVC pipe only.

Mayank Pandeyz

Professional

What type of insulation goes under concrete slab?

Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene (EPS) and extruded polystyrene (XPS). Although both are closed cell insulations, they perform very differently over the long term.

UnkwnTech

Professional

What is the mixture of cement and water called?

The paste, composed of portland cement and water, coats the surface of the fine (small) and coarse (larger) aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.

jbmilgrom

Professional

What is concrete without reinforcement called?

Mud slabs. Mud slabs, also known as rat slabs, are thinner than the more common suspended or ground-bearing slabs (usually 50 to 150 mm), and usually contain no reinforcement.

fortran

Professional

What was Roman concrete called?

opus caementiciumRoman concrete, also called opus caementicium, was a material used in construction in Ancient Rome. Roman concrete was based on a hydraulic-setting cement. It is durable due to its incorporation of pozzolanic ash, which prevents cracks from spreading.

Alexei - check Codidact

Professional

What age is concrete thinking?

Children ages 6 to 12 years old develop the ability to think in concrete ways. These are called concrete operations. These things are called concrete because they're done around objects and events.

MicTech

User

What is concrete thinking in psychology?

Concrete thinking is reasoning that's based on what you can see, hear, feel, and experience in the here and now.

It's sometimes called literal thinking, because it's reasoning that focuses on physical objects, immediate experiences, and exact interpretations..

Mahade Walid

User

Should I cover new concrete with plastic?

Plastic Sheeting Can Permanently Discolor Concrete. Adverse weather conditions such as rain, snow, or freezing temperatures often make it necessary to protect concrete by covering it. ... That's what makes curing concrete with plastic so effective: the plastic keeps the concrete damp.

Meno Hochschild

User

Can you pour concrete into plastic?

Pour concrete into fancy, round or square plastic planters. Use a smaller plastic container to form the inside of the planter. Your new concrete planter will be shaped and decorated just like the hard plastic original.

florisla

User

How do I keep my concrete planters from cracking?

The easiest solution for preventing the concrete from losing too much water is to wrap it in plastic while it's curing. You can even mist it with water first and then wrap it if you want to play it a bit safer. Using plastic to keep in moisture is what is referred to as water curing.

Ali Irani

User

Can I mix cement with a drill?

Mix this in a large plastic bucket using a fully charged power drill and the under-$10 StirWhip drill attachment. ... The attachment's multi-finger configuration helps reduce drag on your drill while slicing quickly through the mix for a smooth blend.

Paul Morgan

Guest

Can you concrete over plastic pipes?

plastic pipe will also react against cement. all plastic pipe web sites will tell you it must be insulated." The plastic pipe will not react against cement.

Donut

Guest

What is the best insulation for under a concrete slab?

Applying a bead of polystyrene-compatible caulk or mastic to the top of the insulation board minimizes water infiltration behind it. For under-slab applications, the rigid foam insulation typically should be installed over a gravel base, with a poly vapor diffusion retarder between the gravel and insulation.

Paul LeBeau

Guest

What can I use for cement molds?

Something as simple as a plastic pumpkin could be your next concrete mold.

Because plastic pumpkins already have the jack-o'-lantern face embossed on their surface, you don't have to carve anything—you can create a smiling pumpkin simply by pouring Quikrete concrete mix directly into the plastic bucket..

Edward Brey

Guest

What can you use as a concrete mold?

Something as simple as a plastic pumpkin could be your next concrete mold. Because plastic pumpkins already have the jack-o'-lantern face embossed on their surface, you don't have to carve anything—you can create a smiling pumpkin simply by pouring Quikrete concrete mix directly into the plastic bucket.

rogeriopvl

Guest

What is a cement brick?

[si′ment ‚brik] (materials) A type of brick made from a mixture of cement and sand, molded under pressure and cured under steam at 200°F (93°C); used as backing brick and where there is no danger of attack from acid or alkaline conditions.

Yangshun Tay

Guest

Why do you cover concrete with plastic?

Covering the curing concrete with plastic keeps it cleaner, but there is a more important purpose behind this practice.

...

To prevent cracks, plastic is placed over the curing concrete to trap the water inside and regulate its temperature, ensuring gradual curing..

Óscar López

Guest

Can you cover wet concrete with plastic?

Another method to prevent discoloration is to place dry straw directly onto the concrete, then put the plastic on top of it. Wet the concrete, then place the plastic sheeting over it. ... Once a day, remove the plastic sheet and wet the concrete, then replace the cover. Do this for a week for the best results.

George Lvov

Guest

Do you put plastic under concrete slab?

In California they place sand between slabs and plastic vapor barriers—in Florida they don't. Almost everywhere (except “California”) that slabs are placed on the ground—a plastic sheet—a vapor barrier—is located directly under the concrete slab and on top of the ground (Photograph 1).

bookcasey

Guest

How do you break concrete at home?

InstructionsCover the concrete slab with 4 mil plastic sheeting if you're working near windows.Dig under the concrete if you're able to do so.Start to break the concrete, starting six inches from the edge and working your way in. ... Pry with a long bar or wrecking bar as you go. ... Cut any mesh wire with bolt cutters.More items...•Oct 14, 2019

hexacyanide

Guest

What is the concrete around a pool called?

The hardscape area around your swimming pool is called a surround, deck, or decking, even though it isn't always made of wood or composite, like traditional outdoor decks with which we most often associate the words. Traditionally, most in-ground swimming pool decks are made of concrete.

Manu Chadha

Guest

Should I cover concrete with plastic?

Rapid Moisture Loss Is Your Enemy Covering the curing concrete with plastic keeps it cleaner, but there is a more important purpose behind this practice.

...

To prevent cracks, plastic is placed over the curing concrete to trap the water inside and regulate its temperature, ensuring gradual curing..

chepner

Guest

Should I cover my concrete with plastic?

Rapid Moisture Loss Is Your Enemy Covering the curing concrete with plastic keeps it cleaner, but there is a more important purpose behind this practice. ... To prevent cracks, plastic is placed over the curing concrete to trap the water inside and regulate its temperature, ensuring gradual curing.

EliteDaMyth

Guest

Should you cover fresh concrete with plastic?

Covering the curing concrete with plastic keeps it cleaner, but there is a more important purpose behind this practice. ... To prevent cracks, plastic is placed over the curing concrete to trap the water inside and regulate its temperature, ensuring gradual curing.

shazow

Guest

Should you put plastic under concrete slab?

Recently, though, research has shown that the old traditional layer of 6-mil Visqueen (polyethylene plastic) under the slab is seldom effective for two main reasons: Although it may seem water-tight, this grade of material allows a lot of water vapor to pass through.

David Thielen

Guest

What is a concrete thinker?

Concrete thinking is reasoning that's based on what you can see, hear, feel, and experience in the here and now. It's sometimes called literal thinking, because it's reasoning that focuses on physical objects, immediate experiences, and exact interpretations.

Eduardo Maroto Campos

Guest

What is concrete called before it hardens?

In its simplest form, concrete is a mixture of paste and aggregates, or rocks. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.

Adam Matan

Guest

What is concrete dusting or chalking?

Dusting Concrete Surface. Formation of loose powder resulting from disintegration of surface of hardened concrete is called dusting or chalking. The characteristics of such surfaces are: They powder under any kind of traffic. They can be easily scratched with a nail or even by sweeping.

Tim Perry

Guest

What is in concrete that makes it hard?

The concrete solidifies and hardens through a chemical process called hydration. The water reacts with the cement, which bonds the other components together, creating a robust, stone-like material.

David Hedlund

Guest

What is plastic cement good for?

Use plastic cement to fill and seal joints in concrete, wood, metal or masonry building construction or mix it with asphalt to hang roofing tiles. It may also be used to seal parapet walls, flashing, skylights and to repair all types of cracks.

akhil_mittal

Guest

What is the best cement for plastic models?

Glue Masters Thick Instant Glue. This viscous glue is a great go-to for model building. ... Devcon Duco Plastic and Model Cement. If your models are made largely of plastic, consider Duco's plastic cement. ... Elmer's Model and Hobby Cement. ... Model Expo Insta Cure. ... Testors Plastic Model Cement.Feb 18, 2021

iota

Guest

What is the difference between regular cement and plastic cement?

Facts. Portland cement, known also as hydraulic cement, is a finely ground, grayish powder used as a binding material and made from pulverized and burned limestone and clay or limestone and shale mixtures. Plastic cement, a flexible, water-resistant sealant, is made from portland cement.

TheJim01

Guest

What is the purpose of plastic sheeting under a concrete slab?

The sand layer cannot dry downwards by vapor diffusion because of the plastic sheet—it is a vapor barrier after all. In fact that's why we have it under the slab. We want a vapor barrier under the slab. ** We want to prevent water vapor from coming up from the ground into the concrete slab.

cletus

Guest

What causes concrete thinking?

Concrete thinking is reasoning that's based on what you can see, hear, feel, and experience in the here and now. It's sometimes called literal thinking, because it's reasoning that focuses on physical objects, immediate experiences, and exact interpretations.

BelHadjSalem TALEL

Guest

What causes concrete to harden?

The water causes the hardening of concrete through a process called hydration. Hydration is a chemical reaction in which the major compounds in cement form chemical bonds with water molecules and become hydrates or hydration products.

Gabriel Staples

Guest

Why is my concrete paint peeling?

When the water evaporates the alkali leave a crystallized substance called efflorescence, which pushes against the paint film and causes peeling. If there is no moisture barrier under the concrete, moisture can easily seep through. Old concrete may crumble, taking the paint film along with it.

George Profenza

Guest

Why is reinforced concrete classed as a composite material?

Concrete has good 'strength' under compression but it is weak in tension. It can be made stronger under tension by adding metal rods, wires, mesh or cables to the composite. The concrete is cast around the rods. This is called reinforced concrete.

jieong

Guest

How do I get rid of snakes under my concrete porch?

Snake Under a Shed, or Under the House, Deck, or PorchCall a pro: The best way to get rid of snakes under a house or other building is to hire a professional, especially if it is large or poisonous. ... Trim plants: ... Instal a snake fence around the perimeter of the shed: ... Use repellents? ... A dog or cat: ... Rodent control under the house:

Stephan Pieterse

Guest

What is the best concrete to use for a shower pan?

The best concrete mix for shower pans is made by Quikrete. They make two products, the first is called Floor Mud, the 2nd is their Sand/Topping mix. Both work great for building a shower pan.

Simon Tewsi

Guest

Can you pour concrete on plastic?

You can build a framework around the concrete slab with lumber, PVC pipes, or rebar to hold the plastic sheeting. Another method to prevent discoloration is to place dry straw directly onto the concrete, then put the plastic on top of it. Wet the concrete, then place the plastic sheeting over it.

Penelope Stevens

Guest

What will cement stick to?

Cement sticks very well to plastic, or at least Portland cement concrete does. Leave a little residue in a plastic paint bucket, on a plastic tool handle, or on any other plastic surface, and try to get it off a few days later.

apsillers

Guest

Why do you put plastic under a concrete slab?

In fact, most professional shed slab builders will install a polyethylene membrane under a shed concrete slab even if it is not specified. The reason is that the vapour barrier stops moisture from the wet concrete escaping into the ground under the concrete.