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What is moisture correction in concrete? - Quora

Moisture correction is nothing but correction in quantity of free water in concrete mix design, depending upon the existing moisture content and percentage of absorption of materials. The water absorption of material is known as the percentage of ...

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What is the moisture content of sand for concrete? - Quora

Moisture content of sand used for concrete production needs to be measured. It is then subtracted from the water demand for a specific concrete mix design. It can me measured by physically weighing the wet sand and drying it to constant weight. Di...

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Is dryloc a suitable moisture barrier on concrete ... - Quora

Firstly the exterior of the conc.foundation wall (basement) has to have a good damproofing membrane system or the best is a waterproofing membrane. Then when the interior is framed for finishing you install (staple) a 6 mil polyethelene vapour bar...

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How to calculate water quantity in concrete - Quora

The water content for concrete can be decided based on the site conditions as mentioned below Let us assume that we are casting M15 grade of concrete. Suppose we are taking 240 kg of cement for 1m3. Condition is Moderate. So as per code take w/c r...

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What is the moisture content range of clay for roads? - Quora

I don’t understand the question. Is the road going to be built on top of a base that has compacted earth, and you want to know how much the moisture content could vary? When earth material is compacted it is a mixture of sand, silt, and clay. In o...

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What are the different types of shrinkage which occur in ...

Concrete made with light weight aggregate has a higher moisture movement than normal weight aggregate concrete. The irreversible part of shrinkage is associated with the formation of additional chemical and physical bond in the cement gel when adsorbed water has been removed.

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What is Damp proof membrane under concrete slab? - Quora

Apr 24, 2021  Damp proof membrane DPM Damp in buildings can cause a number of serious problems, such as: * Damp patches. * Mould growth, which is a cause of respiratory allergies. * Mildew, salts, staining and ‘tide marks’. * Damage to surface finishes. * Corro...

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Does water weaken concrete? - Physics Chemistry

Quora User. retired carpenter ... Unless the aggregate gradation and proportion are balanced with the correct amount of cement paste, excessive shrinkage, cracking and curling can result. ... Curing is the maintaining of an adequate moisture content and temperature in concrete at early ages so that it can develop the properties the mixture was ...

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What are the different types of shrinkage which occur in ...

Concrete made with light weight aggregate has a higher moisture movement than normal weight aggregate concrete. The irreversible part of shrinkage is associated with the formation of additional chemical and physical bond in the cement gel when adsorbed water has been removed.

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What Are Safe Moisture Levels in Concrete?

Most “Concrete” Moisture Meters Only Check Surface Moisture. Concrete slabs often have thicknesses measured in feet, not inches. Moisture meters can only check the moisture near the surface of a concrete slab, which is not sufficient for predicting how the slab will react to having sealant applied or other building materials installed over it.

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8 Truths about Concrete Moisture - Concrete Moisture

The capillaries in the concrete act like a sponge that can soak up direct water sources. In addition, when the humidity of the air outside the slab is high, the concrete can start absorbing moisture instead of releasing it or it can impede the drying process altogether. 4. The critical point when the moisture

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What is meant by the term recycled aggregate concrete? - Quora

Apr 11, 2021  Recycled aggregates are developed from the reprocessing of materials that have been originally used in construction. They include sand, gravel, crushed stone, and asphalt. Essentially, the term refers to materials that have been previously used in...

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What is Ready Mix Concrete? - Anything Informative - Quora

Sep 07, 2020  Ready-mix concrete is concrete that is manufactured in a batch plant, according to a set engineered mix design. Ready-mix concrete is normally delivered in two ways. First is the barrel truck or in–transit mixers. This type of truck delivers concrete in a plastic state to the site. Second is the volumetric concrete mixer.

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Aggregate Moisture Content Concrete Construction Magazine

Dec 16, 2010  Q: What does the term “saturated surface dry” mean in relation to concrete aggregates? A: The term is one of four used to describe the moisture content of the aggregate prior to mixing, and refers to a condition where all pores in each particle of aggregate are filled with water, but no excess water appears on the surface of the particle. The other terms are “ovendry” for aggregate ...

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What is a Normal Reading on a Moisture Meter? – Damp Solving

Nov 06, 2020  On top of that, concrete can be mixed differently, and as a result, have different densities and physical properties. This affects the moisture-holding capacity of the slab and what MC% is considered safe and acceptable. In other words, dense mixes of concrete allow less moisture to penetrate the slab than lighter ones.

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Testing Moisture Content of Concrete Floors and Slabs

Jul 10, 2019  Why Concrete Moisture Is Tested . If excess moisture is present in a concrete slab when an impermeable surface treatment is installed, it will become trapped under that covering. Over time, hydrostatic pressure will force that moisture upwards and can cause bubbles in surface treatments, and cracks in covering materials that are installed above it.

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How to Stop Moisture in Concrete Floor? - The Constructor

🕑 Reading time: 1 minute Commonly, concrete floors are vulnerable to moisture and suffer from different detrimental influence of moisture such as lifting tile off the floor, rotting hardwood, damping carpet, coating delamination and many more. These problems are not only disrupting functions of the building due to maintenance operations but also costly. Therefore, it []

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An aggregate sample whose largest dimension is greater ...

Aggregates are the inert materials that are mixed in fixed proportions with a binding material to produce concrete. They act as fillers or volume increasing components and are responsible for the strength, hardness and durability of concrete.the aggregates occupy 65-80% of the volume of concrete.

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Are mortars lightweight, or are ... - thegunclub.quora

Mortars are MUCH lighter than a ‘standard’ artillery piece of the same calibre. This is a Russian 122mm field gun- combat weight about 7,100kg. This is a towed 120mm mortar- 231kg combat weight. Yes, 231 kilos isn’t a light bit of kit- but it is much less than the field gun.

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What could be the reason for horizontal cracks in ... - Quora

Firstly find the volume of concrete in cu.m. Then if it is P.C.C multiply it by 2400 as density of concrete is 2400kg/ cu.m. Now for R.C.C u know the no. Of bars and their lengths. Find cross sectional area of each bar and multiply by length E.g: - π/4 X d X d X L (d=diameter of bar, L = length of bar) Now the result is the volume of bar.

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How To Fix Moisture Problems In A Concrete Floor Epoxy ...

The moisture vapor barrier helps reduce the passage of fluids through concrete. It successfully alleviates the problems associated with moisture accumulation in a concrete slab, keeping moisture from reaching the epoxy flooring system. The number of primer barrier layers is based on the amount of moisture present in concrete.

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Three Key Lessons about Moisture in Concrete Concrete ...

Jun 14, 2019  The question was how this had impacted the moisture condition of the concrete slab. The contractor brought in dehumidifiers to address the basement’s wetness. Then, after the basement seemed to have dried out a bit, he tested the moisture condition of the floor slab using the surface-based calcium chloride test (ASTM F1869).

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Is it okay to pour concrete over backfill? - Quora

Again, depending on the type of soil you have, you’ll either need add 3 or 8 inches of gravel or crushed rock. Take a roller or a vibrator compactor and compact and level out the gravel. Next Step : Pouring Concrete. Unless your patio is going to be the size of your driveway, you can pour concrete

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How Can I Find out the exact Source of Leakage/damp in ...

All concrete shrinks as it dries, but there are things that you can do to lessen the effect. If the top dries faster than the bottom, as is usually the case, there is likely to be some amount of curling. However, it may be very insignificant. It is difficult if not impossible to correct after the concrete is on the ground.

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Moisture Measurement in Concrete Mixing including Ready ...

The Hydro-Mix moisture sensor has been designed to fit level with the floor of a concrete mixer and can be installed in pan mixers, planetary mixers and single and twin shaft mixers. Alternatively, the Hydro-Probe Orbiter can be mounted to the scraper arm of a pan or turbo mixer or the side of a rotating pan mixer and measures moisture content ...

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Curing Concrete – Normal, Hot and Cold Weather

Curing Concrete – Normal, Hot and Cold Weather. Introduction Portland cement consists of several complex chemical compounds (see composition of cement).In the preparation of concrete, the cement acts as a glue which bonds together the aggregates to achieve the final castproduct.

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Fixing Moisture Problems in Concrete slab - The Constructor

🕑 Reading time: 1 minute Concrete slabs on grade and basement slabs are weak and vulnerable to the detrimental effect of moisture which may lead to various problems. For instance, lifting tile off the floor, rotting hardwood, damping carpet, and coatings delamination. Added to that, beneath continuous flooring, moisture can also cause floor darkening or []

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The Importance of Aggregate Correction Factors in Air ...

Aug 05, 2016  Field testing on this concrete without the use of the aggregate correction factor shows an air content reading of 4.0%, and the concrete is reported as meeting specifications. However, in reality this concrete may or may not meet specifications because even a very small correction factor would result in this concrete having a lower air content.

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Determining Moisture in Aggregate ... - Concrete Construction

Mar 01, 1986  The Speedy Moisture Tester. One of the simplest methods of testing, using equipment specifically designed for moisture tests, is the Speedy Moisture Tester, made by a British manufacturer and marketed for about $1000 by several concrete testing equipment suppliers in this country, such as those listed below.

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Methods of Batching Concrete - The Constructor

Moisture content presence in the aggregate should also be considered while batching. In case of fully automatic weigh batching it can be considered but volume batching is not suitable in such cases. Compressive strength of same concrete mix at 7 days and 28 days is higher for weigh batching concrete mix than volume batching concrete mix.

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Moisture Content

Moisture Content. Moisture States: Since aggregates contain some porosity, water can be absorbed into the body of the particles or retained on the surface of the particle as a film of moisture. The following four moisture states are defined: ... It represents the "equilibrium moisture" state of the aggregate in concrete; that is, the aggregate ...

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What could be the reason for horizontal cracks in ... - Quora

Firstly find the volume of concrete in cu.m. Then if it is P.C.C multiply it by 2400 as density of concrete is 2400kg/ cu.m. Now for R.C.C u know the no. Of bars and their lengths. Find cross sectional area of each bar and multiply by length E.g: - π/4 X d X d X L (d=diameter of bar, L = length of bar) Now the result is the volume of bar.

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Storage of Cement - Precautions, Duration and Place of ...

🕑 Reading time: 1 minuteProper precautions for the storage of cement such as duration and place of storage, arrangement, atmospheric moisture content etc. is necessary after the process of manufacturing and before using it in the construction site. Because the cement hygroscopic nature, the cement absorbs moisture from the atmosphere very actively and hardens like []

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What are the Correct Concrete Mixing Ratios - Ratio Chart

A concrete overlay is a very thin layer of specially designed bag mix concrete used to resurface, repair or stamp existing concrete surfaces. Read More The proper concrete mixing ratios are 1:2:3, 1:3:3, 1:2:4 for cement, sand, and stone.

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