Technique 1: Improve technical level, stabilize product quality, and strengthen technological gets:
According to the survey, only a few suppliers of polycarboxylic acid water reducer products in my country are independently developed, and most other suppliers present modern technology from college study institutions or study institutes or straight introduce modern technology from other business to begin manufacturing. As a result of the limited technological strength of the producers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer modern technology they produce, and it is tough to adjust to various changes in basic materials and processes, and there is no way to discuss the security of item quality. As a result, it is recommended that polycarboxylic acid water-reducing representative makers actively cooperate with colleges and research institutes to fully comprehend the numerous variables affecting the efficiency of polycarboxylic acid water-reducing agent items, adjust the synthesis procedure criteria in a prompt manner to stabilize item quality, and enhance technical reserves with joint or independent r & d to adapt to market demand. On top of that, the very early launch of polycarboxylic acid water-reducing representative basic material criteria and the security of polycarboxylic acid water-reducing representative basic material prices are additionally really vital to ensure the security of polycarboxylic acid water-reducing representative item performance.
Technique 2: Belief in examination outcomes as opposed to item requirements
Some products that are outstanding in the water-reducing agent requirements, or perhaps products with superb test results, may not be suitable for a particular project. However, some items may meet the demands of concrete material prep work for a certain task despite the fact that the test results are not really superior. Furthermore, because of modifications in basic materials, the test outcomes during project bidding can not stand for the actual execution of the task. GB50119-2003 “Technical Specifications for Application of Concrete Admixtures” “2.1.4” plainly specifies: The raw materials used in concrete with admixtures, such as concrete, sand, rock, admixtures, and admixtures, shall comply with the provisions of the appropriate nationwide requirements active; when trial-mixing concrete with admixtures, the raw products made use of in the task shall be used, and the examination things shall be figured out according to the style and construction demands. The examination problems will coincide as the building and construction problems. When the raw products utilized in the task or the concrete efficiency needs alter, the trial-mixing test will be performed again.
(Cabr superliasticizer)
Approach 3: Prevent call between polycarboxylic acid water reducers and iron products
For polycarboxylic acid water reducer producers and distributors, special manufacturing devices and production lines shall be used to manufacture and worsen polycarboxylic acid water reducers, and polycarboxylic acid water reducers will not be manufactured or worsened using the exact same production line as various other water reducers. On top of that, the transportation and storage of polycarboxylic acid water reducers shall not use iron products (except stainless steel) but plastic, glass and various other products. Contact with iron occasionally causes modifications in the performance of polycarboxylic acid water reducers.
Approach 4: Resolutely stay clear of mixing other kinds of admixtures
It is strictly restricted to blend other water reducers or other sorts of admixtures. There are 2 significances. Initially, the compounding of polycarboxylic acid water reducers (such as with lignin sulfonate, air entrainment, defoaming, retarding and various other elements) can just be accomplished by admixture makers or providers. The user of the water reducer, that is, the concrete preparer, just needs to test and keep its pertinent performance. No other components might be worsened in it, neither might other elements be mixed in it due to oversight. It is absolutely prohibited to use pumps and metering devices for pumping and metering other admixtures without cleansing. An additional definition is that concrete mixing devices, transport lorries, and pumping tools are best made use of for concrete mixed with polycarboxylic acid water reducers. When sharing mixing equipment, transport cars and pumping equipment, these devices needs to be completely cleaned up prior to they can be used for concrete blended with various other kinds of admixtures, and vice versa.
Method 5: Purely measure the water reducer and mix water
When preparing concrete blends with polycarboxylic acid water reducers, the optimum water reducer dose and water usage figured out by the laboratory should be strictly gauged. Do not raise the water reducer dose or water intake at will certainly to stay clear of negative sensations such as partition, bleeding, solidifying, and boosted air content in the combined concrete, which will certainly influence the typical pumping building and putting high quality of the concrete.
The dampness consisted of in the raw products sand and rock aggregates have to be accurately determined and subtracted from the overall water consumption to stop negative effects triggered by incorrect detection of the dampness contained in the sand and rock accumulations.
( concrete addtives)
Technique 6: Correctly encounter the compatibility problem of polycarboxylic acid water reducers and cement/admixtures
The compatibility trouble of admixtures and cement/admixtures has a lengthy history. Over the years, the versatility study work on naphthalene-based high-efficiency water-reducing agents and their compound products has actually achieved good results:
With the hard work of researchers, concrete preparers, admixture makers, concrete and admixture suppliers, concrete constructors and managers have jointly recognized this trouble, altering the circumstance in which admixture suppliers and vendors have actually always thought all responsibilities. The conflict of admixtures and cement/admixtures is credited to several affecting variables, and comprehensive research study has actually been performed on their affecting laws. A series of effective options have been checked out for the certain incompatibility in between admixtures and cement/admixtures.
Approach 7: Purely regulate the resonance distance and vibration time
Given that the depression of concrete prepared with polycarboxylic acid-based water-reducing representatives is typically huge and the viscosity of the combination is reduced, the vibration distance and resonance time after the concrete mix is put ought to be determined via experiments or need to be guided by specialists. Expect the vibration radius is also little or the resonance time is also long. In that case, it is easy to cause architectural issues such as a serious decline in concrete air content and serious stratification of the aggregate stage and paste phase.
Technique 8: Enhance first upkeep and avoid breaking.
On any kind of event, for any concrete combination, initial and later maintenance after pouring is very important.
Polycarboxylic acid water reducer has little impact on the shrinking efficiency of concrete; to put it simply, the enhancement of polycarboxylic acid water reducer does not exceedingly enhance the shrinkage of concrete, which does not suggest that the concrete with polycarboxylic acid water reducer can relax or even terminate the upkeep.
Like concrete with various other admixtures, the second surface area denigration, film covering or spraying of concrete with polycarboxylic acid water reducer after pouring and resonance is very efficient in stopping its plastic shrinking splits. Constant 7d or 14d hydrating maintenance is not only needed for the regular growth of concrete stamina however likewise a warranty to avoid its drying contraction cracks.
( foamed concrete)
In order to improve the crack resistance of concrete with polycarboxylic acid, it is also needed to include a specific amount of fiber, and this type of concrete still needs excellent damp treating to make certain that the framework does not split.
Method 9: Building and construction and management systems need to work closely with concrete preparation and admixture vendors
In the task, it is unpreventable to encounter numerous technical difficulties, technological disagreements and also problems and disagreements caused by engineering mishaps. The utmost goal of all events involved in the project is to make certain the smooth progress of the task and the top quality of the job. The history of polycarboxylic acid water reducers in manufacturing and application in real jobs is extremely brief, and the accumulated engineering experience could be much better. It is easy to experience application problems and also result in design mishaps at this time, the construction unit or administration unit needs to work very closely with the concrete preparation, polycarboxylic acid water reducer production and supply, and cement/admixture manufacturing and supply from a technological point of view and conduct comprehensive evaluation to propose efficient solutions.
Vendor
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