Method 1: Improve technological degree, maintain item quality, and enhance technical gets:
According to the survey, only a few suppliers of polycarboxylic acid water reducer products in my country are separately established, and most various other makers present technology from college research establishments or study institutes or directly present modern technology from various other business to begin production. As a result of the minimal technological stamina of the suppliers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer modern technology they generate, and it is difficult to adjust to various modifications in raw materials and processes, and there is no way to discuss the stability of product high quality. For that reason, it is recommended that polycarboxylic acid water-reducing agent manufacturers actively cooperate with colleges and research institutes to fully recognize the various aspects impacting the efficiency of polycarboxylic acid water-reducing representative products, readjust the synthesis procedure parameters in a prompt way to stabilize product high quality, and enhance technical reserves through joint or independent research and development to adjust to market demand. Additionally, the early release of polycarboxylic acid water-reducing agent resources criteria and the stability of polycarboxylic acid water-reducing representative resources rates are also extremely important to guarantee the stability of polycarboxylic acid water-reducing agent product efficiency.
Approach 2: Idea in test results as opposed to item specifications
Some products that are impressive in the water-reducing agent specifications, or perhaps products with exceptional test results, might not be suitable for a certain job. On the other hand, some products may fulfill the demands of concrete material preparation for a specific project although the test outcomes are not really superior. On top of that, because of modifications in basic materials, the test results throughout project bidding process can not stand for the actual application of the job. GB50119-2003 “Technical Specs for Application of Concrete Admixtures” “2.1.4” plainly states: The raw materials utilized in concrete with admixtures, such as concrete, sand, rock, admixtures, and admixtures, shall comply with the arrangements of the relevant national requirements effective; when trial-mixing concrete with admixtures, the raw products made use of in the project will be used, and the test items shall be established according to the style and building and construction requirements. The test conditions shall be the same as the construction problems. When the raw products utilized in the project or the concrete efficiency needs transform, the trial-mixing test shall be carried out once again.
(Cabr superliasticizer)
Method 3: Prevent get in touch with between polycarboxylic acid water reducers and iron materials
For polycarboxylic acid water reducer makers and distributors, special production devices and production lines shall be used to synthesize and worsen polycarboxylic acid water reducers, and polycarboxylic acid water reducers will not be manufactured or worsened using the exact same production line as other water reducers. On top of that, the transportation and storage space of polycarboxylic acid water reducers shall not use iron materials (except stainless steel) yet plastic, glass and other products. Contact with iron in some cases triggers adjustments in the performance of polycarboxylic acid water reducers.
Approach 4: Resolutely prevent mixing various other sorts of admixtures
It is purely prohibited to blend various other water reducers or various other types 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 parts) can only be executed by admixture producers or distributors. The customer of the water reducer, that is, the concrete preparer, just needs to examine and keep its pertinent efficiency. Nothing else components may be compounded in it, nor might other components be mixed in it because of negligence. It is definitely forbidden to use pumps and metering tools for pumping and metering various other admixtures without cleansing. One more significance is that concrete mixing equipment, transport automobiles, and pumping tools are best made use of for concrete mixed with polycarboxylic acid water reducers. When sharing mixing tools, transport vehicles and pumping equipment, these devices has to be extensively cleaned up prior to they can be utilized for concrete mixed with other kinds of admixtures, and vice versa.
Technique 5: Purely determine the water reducer and mix water
When preparing concrete mixes with polycarboxylic acid water reducers, the optimal water reducer dosage and water usage identified by the laboratory needs to be purely determined. Do not increase the water reducer dose or water usage at will certainly to avoid damaging phenomena such as partition, bleeding, solidifying, and increased air web content in the combined concrete, which will certainly impact the normal pumping construction and pouring top quality of the concrete.
The dampness had in the raw products sand and stone aggregates have to be properly measured and subtracted from the complete water intake to stop damaging consequences triggered by incorrect detection of the wetness consisted of in the sand and stone aggregates.
( concrete addtives)
Technique 6: Properly face the compatibility problem of polycarboxylic acid water reducers and cement/admixtures
The compatibility issue of admixtures and cement/admixtures has a lengthy history. For many years, the adaptability study deal with naphthalene-based high-efficiency water-reducing representatives and their compound products has actually accomplished good outcomes:
With the effort of researchers, concrete preparers, admixture suppliers, cement and admixture producers, concrete fabricators and managers have collectively acknowledged this problem, altering the circumstance in which admixture producers and suppliers have actually constantly presumed all responsibilities.The incompatibility of admixtures and cement/admixtures is credited to several influencing factors, and comprehensive research study has been executed on their influencing legislations. A series of effective solutions have actually been checked out for the specific incompatibility between admixtures and cement/admixtures.
Method 7: Strictly manage the resonance span and resonance time
Considering that the downturn of concrete prepared with polycarboxylic acid-based water-reducing representatives is typically huge and the viscosity of the mixture is low, the resonance distance and vibration time after the concrete blend is poured need to be identified via experiments or should be led by specialists. Intend the vibration span is also little or the vibration time is as well long. In that case, it is very easy to create structural flaws such as a serious decline in concrete air content and severe stratification of the aggregate phase and paste stage.
Technique 8: Enhance preliminary upkeep and stop fracturing.
On any type of event, for any kind of concrete combination, preliminary and later upkeep after pouring is very important.
Polycarboxylic acid water reducer has little impact on the shrinkage efficiency of concrete; in other words, the addition of polycarboxylic acid water reducer does not excessively increase the contraction of concrete, which does not suggest that the concrete with polycarboxylic acid water reducer can loosen up or even cancel the upkeep.
Like concrete with other admixtures, the second surface area smearing, film covering or spraying of concrete with polycarboxylic acid water reducer after putting and resonance is extremely effective in stopping its plastic shrinking cracks. Continuous 7d or 14d hydrating upkeep is not only required for the normal development of concrete strength but likewise a guarantee to stop its drying out shrinkage fractures.
( foamed concrete)
In order to enhance the fracture resistance of concrete with polycarboxylic acid, it is likewise needed to include a certain quantity of fiber, and this type of concrete still requires great wet curing to make sure that the framework does not fracture.
Approach 9: Building and management devices must function closely with concrete preparation and admixture suppliers
In the project, it is inevitable to come across different technical troubles, technical conflicts and even disputes and disputes triggered by design mishaps. The utmost objective of all events associated with the job is to ensure the smooth progression of the task and the high quality of the job. The history of polycarboxylic acid water reducers in production and application in real tasks is extremely brief, and the built up engineering experience can be far better. It is simple to come across application issues and also lead to engineering crashes at this time, the construction system or administration unit needs to function closely with the concrete preparation, polycarboxylic acid water reducer manufacturing and supply, and cement/admixture production and supply from a technological perspective and carry out comprehensive evaluation to recommend effective remedies.
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