what happens in the process if to much cement is added to water

Jul 31, 2008· Best Answer:Water addsvolume toconcreteand yes it does weaken it. It also allowsthe concretemix to become more fluid, and when thathappens theaggregate (rock) that is in concrete starts to easily sink lower and lower in the slab or wall. Then the lighter weight sand,cement isat the top.

Apr 23, 2014· About half ofthe water in concrete isconsumed inthe chemical reaction of hydration and theother half providesthe concrete’s workability. Except forthe waterlost to bleeding and absorbed by...

Sep 25, 2007· When there is too much water in the concrete, there isgreater shrinkage with the possibility for more cracks and reduced compressive strength. As a general rule, every additional inch of slump decreases strength by approximately 500 psi.

The cement (and cementitious materials like fly ash) in the concreteneeds water to hydrate and form calcium-silicate-hydrate (C-S-H) which is the crystalline gluethat holds the concrete together. The water is chemically bound (consumed) during the reaction with the cement at approximately 25 pounds of water to every 100 pounds of cement.

The process is known as hydration. Cement consists of the following major compounds (see composition of cement): Tricalcium silicate, C 3 S; Dicalcium silicate, C 2 S; Tricalcium aluminate, C 3 A; Tetracalcium aluminoferrite, C 4 AF; Gypsum, CSH 2;Chemical reactions during hydrationWhen water is added to cement, the following series of reactions occur:

The termscementandconcreteare used interchangeably, althoughcementis actually an ingredient ofconcrete. Gypsum is oftenaddedtocementandconcreteto slow down the drying time.Cementdries quickly and retarding thatprocessallows workers to pour the …

Cement and water form a paste that coats each particle of stone and sand—the aggregates. Through a chemical reaction called hydration, the cement paste hardens and gains strength. The quality of the paste determines the character of the concrete.

The hydration reaction transforms the Portland cement into crystals that weave into adjacent crystals and form a dense interlocking lattice. With the right amount of water this reaction makes very strong concrete - too much or too little water will weaken concrete.

Soil-cementis a mixture of Portlandcement, natural soil, andwaterused to form a hard, semi-rigid paving surface.It is most often used in highways or as a sub-base for asphalt or other forms of paving, but it can also be used as a cheap stand-alone paving surface for driveways, sidewalks, patios, or garage floors.

never addcementorwater, it will have effect on theWater-cementratio, end so directly an effect on the quality ) strength) and environmental Class. Morecementgives you more cracks, so more rebar is needed. Sometimes in cold weather we change the mixture by adding more or different type ofcement.

RENEGADE GARDENER™ The lone voice of horticultural reason Don't add toomuch waterwhen mixing a batch ofconcrete. Mixing a batch ofconcretein the wheelbarrow is something most homeowners can't imagine having to do, then they become gardeners and the next thing they know, they're mixing a batch ofconcrete. Mixing it in one of those plastic-tub wheelbarrows, the one you bought at the ...

Thewatertocementratio largely determines the strength and durability of theconcretewhen it is cured properly. The w/c ratio refers to the ratio of the weights ofwaterandcementused in theconcretemix. A w/c ratio of 0.4 means that for every 100 lbs ofcementused in theconcrete, 40 lbs ofwater is added.

Thewater-cementratio is the weight of the mixingwaterdivided by the weight of thecement. High-qualityconcreteis produced by lowering thewater-cementratio asmuchas possible without sacrificing the workability of freshconcrete, allowing it to be properly placed, consolidated, and cured.

The ratio between thewaterandcementby weight is known asWater-CementRatio. The quantity ofwater addedto thecementwhile preparingconcretemixes has been known to exert tremendous influence on the quality ofconcrete. It was first discovered in 1918 A.D. Abraham had evaluated this aspect ofconcreteproportioning and stated:

With the right amount ofwaterthis reaction makes very strongconcrete- toomuchor too littlewaterwill weakenconcrete. Hydrationprocessis slow, takingconcretea full 28 days to reach it's full strength potential. Luckily,concreteis hard after about a day and can be safely handled without damaging the surface after 48 hours.

Attached please find the W/C vsconcretestrength graph. Figure shows that validity range ofwatertocementratio is very limited. Compressive strength is at peak, whenwatertocementratio is low.

This initiates the chemicalprocessand makes 15% ofwater cementpaste also known as a gel to fill the voids in theconcrete. Effects of toomuch waterinconcrete. As stated above we need 23% ofwaterto initiate the chemicalprocessoncement. Adding morewaterthan this allowableWater cementlimit will actually affect the strength.

Why dobuilders say that wet concrete/mortaris not as strong? Ask Question ... Not all of thewaterthatis addedto theconcretemix is necessary for the hydrationprocess. In fact, the amount ofwaterrequired to completely hydrate thecementis only about one half to two thirds of what is usuallyaddedat the batch plant or on the job site. ...

If there is toomuch waterin the mixture, the chemicals and granules are thinned out and the resultingconcretewill be weak -- which is whywatershould never beaddedto specifically formulated pre-mixedconcretefrom a truck in order to make it flow -- but rather special chemicals can beaddedcalled plasticizers that will make it flow more ...

Soil-cementis a mixture of Portlandcement, natural soil, andwaterused to form a hard, semi-rigid paving surface.It is most often used in highways or as a sub-base for asphalt or other forms of paving, but it can also be used as a cheap stand-alone paving surface for driveways, sidewalks, patios, or garage floors.

The June 1991 problem clinic answered a question about addingwatertoconcreteat the jobsite. We quoted from ACI 301-89, which sayswatercan beaddedonly if the maximum permissiblewater-cementratio isn't exceeded. Dick Elstner wrote from Hawaii to ask how an inspector can know whether the maximum permissiblewater-cementratio is exceeded.

Mixing bags ofconcreteisn’t complicated. You add somewater, stir it up and pour it out. But to get the most strength from theconcrete, you have to recognize when it has just the right amount ofwatermixed in. Too littlewaterand the particles in the mix won’t stick together. Toomuch waterweakens theconcrete.

The role ofwateris important because thewatertocementratio is the most critical factor in the production of "perfect"concrete. Toomuch waterreducesconcretestrength, while too little will make theconcreteunworkable.Concreteneeds to be workable so that it may be consolidated and shaped into different forms (i.e.. walls, domes, etc.).

As a general rule, the simplest recipe forconcretecalls for around 10 percentcement, 60 percent sand or aggregate and 15 percentwater, with a little bit of air thrown in for the curingprocess. If toomuch wateris introduced to the mixture, thecementand sand cannot bond with each other and will instead fall apart.