Method 1: Enhance technological level, support item high quality, and reinforce technical gets:
According to the study, only a few producers of polycarboxylic acid water reducer products in my nation are independently established, and many other producers introduce technology from college study establishments or research institutes or straight introduce technology from various other companies to begin production. Because of the restricted technical strength of the makers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer technology they generate, and it is challenging to adapt to different modifications in resources and procedures, and there is no chance to speak about the stability of product quality. Consequently, it is advised that polycarboxylic acid water-reducing agent manufacturers actively accept colleges and study institutes to totally comprehend the various factors affecting the efficiency of polycarboxylic acid water-reducing representative items, change the synthesis process criteria in a prompt fashion to stabilize product quality, and strengthen technological gets with joint or independent research and development to adjust to market demand. In addition, the early release of polycarboxylic acid water-reducing representative raw material criteria and the stability of polycarboxylic acid water-reducing agent basic material prices are also extremely essential to make sure the security of polycarboxylic acid water-reducing representative item performance.
Technique 2: Idea in test outcomes instead of product specs
Some items that are incredible in the water-reducing representative specs, or perhaps items with outstanding test results, may not be suitable for a particular task. On the contrary, some products may meet the demands of concrete product preparation for a certain job despite the fact that the examination outcomes are not extremely outstanding. Additionally, as a result of changes in raw materials, the examination results during project bidding process can not represent the actual execution of the project. GB50119-2003 “Technical Specifications for Application of Concrete Admixtures” “2.1.4” plainly states: The raw products made use of in concrete with admixtures, such as cement, sand, stone, admixtures, and admixtures, shall comply with the provisions of the pertinent national standards active; when trial-mixing concrete with admixtures, the raw materials utilized in the job will be used, and the examination things will be determined according to the style and construction requirements. The test problems will be the same as the construction conditions. When the raw products made use of in the task or the concrete performance demands change, the trial-mixing test will be performed again.
(Cabr superliasticizer)
Method 3: Avoid contact in between polycarboxylic acid water reducers and iron materials
For polycarboxylic acid water reducer producers and providers, unique manufacturing devices and production lines shall be utilized to manufacture and compound polycarboxylic acid water reducers, and polycarboxylic acid water reducers shall not be synthesized or compounded making use of the exact same production line as various other water reducers. Furthermore, the transportation and storage of polycarboxylic acid water reducers shall not utilize iron materials (except stainless-steel) but plastic, glass and other materials. Call with iron occasionally triggers modifications in the efficiency of polycarboxylic acid water reducers.
Method 4: Resolutely avoid blending other kinds of admixtures
It is strictly prohibited to mix various other water reducers or various other sorts of admixtures. There are two definitions. First, the compounding of polycarboxylic acid water reducers (such as with lignin sulfonate, air entrainment, defoaming, hampering and other parts) can just be carried out by admixture producers or suppliers. The user of the water reducer, that is, the concrete preparer, just requires to evaluate and store its relevant efficiency. Nothing else components might be compounded in it, neither may other components be mixed in it due to carelessness. It is absolutely forbidden to make use of pumps and metering tools for pumping and metering other admixtures without cleansing. An additional definition is that concrete mixing devices, transportation vehicles, and pumping equipment are best utilized for concrete combined with polycarboxylic acid water reducers. When sharing mixing devices, transport vehicles and pumping devices, these tools should be extensively cleaned up prior to they can be used for concrete blended with other sorts of admixtures, and the other way around.
Technique 5: Purely gauge the water reducer and mix water
When preparing concrete mixes with polycarboxylic acid water reducers, the optimal water reducer dosage and water intake identified by the research laboratory must be purely measured. Do not increase the water reducer dose or water usage at will certainly to prevent negative phenomena such as segregation, bleeding, hardening, and raised air content in the mixed concrete, which will impact the regular pumping construction and putting high quality of the concrete.
The moisture had in the raw materials sand and stone aggregates must be accurately determined and deducted from the overall water intake to avoid unfavorable consequences brought on by incorrect discovery of the dampness consisted of in the sand and rock aggregates.
( concrete addtives)
Approach 6: Correctly encounter the compatibility trouble of polycarboxylic acid water reducers and cement/admixtures
The compatibility trouble of admixtures and cement/admixtures has a long history. Throughout the years, the versatility research study deal with naphthalene-based high-efficiency water-reducing agents and their compound products has actually achieved good results:
Via the effort of scientists, concrete preparers, admixture makers, cement and admixture manufacturers, concrete erectors and supervisors have jointly recognized this problem, transforming the situation in which admixture producers and vendors have actually always assumed all responsibilities.The incompatibility of admixtures and cement/admixtures is attributed to many influencing factors, and comprehensive research has actually been performed on their influencing regulations. A collection of efficient services have actually been checked out for the particular incompatibility in between admixtures and cement/admixtures.
Technique 7: Strictly control the vibration distance and resonance time
Since the slump of concrete prepared with polycarboxylic acid-based water-reducing representatives is typically huge and the viscosity of the mix is reduced, the resonance radius and resonance time after the concrete mixture is poured ought to be identified through experiments or should be assisted by experts. Intend the vibration span is as well small or the resonance time is as well long. In that instance, it is easy to create structural flaws such as a significant decrease in concrete air material and significant stratification of the accumulated phase and paste phase.
Method 8: Reinforce preliminary maintenance and avoid cracking.
On any celebration, for any concrete blend, first and later maintenance after pouring is extremely essential.
Polycarboxylic acid water reducer has little result on the shrinking performance of concrete; to put it simply, the enhancement of polycarboxylic acid water reducer does not exceedingly boost the shrinking of concrete, which does not mean that the concrete with polycarboxylic acid water reducer can kick back or even terminate the maintenance.
Like concrete with various other admixtures, the additional surface smearing, movie covering or spraying of concrete with polycarboxylic acid water reducer after putting and resonance is extremely effective in stopping its plastic contraction cracks. Continual 7d or 14d moisturizing maintenance is not only essential for the regular growth of concrete stamina but additionally an assurance to avoid its drying out shrinkage fractures.
( foamed concrete)
In order to improve the fracture resistance of concrete with polycarboxylic acid, it is also needed to add a certain amount of fiber, and this sort of concrete still needs excellent wet healing to guarantee that the framework does not split.
Technique 9: Building and construction and monitoring units need to work carefully with concrete prep work and admixture suppliers
In the task, it is unavoidable to come across different technical problems, technological disagreements and even conflicts and conflicts caused by engineering mishaps. The supreme objective of all events associated with the project is to make certain the smooth development of the job and the high quality of the job. The history of polycarboxylic acid water reducers in manufacturing and application in actual jobs is very brief, and the gathered engineering experience could be much better. It is easy to come across application issues and even cause design accidents at this time, the building system or administration unit requires to function carefully with the concrete prep work, polycarboxylic acid water reducer production and supply, and cement/admixture production and supply from a technological perspective and conduct in-depth analysis to propose effective remedies.
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