Approach 1: Improve technical level, support product high quality, and strengthen technological books:
According to the survey, just a couple of manufacturers of polycarboxylic acid water reducer items in my nation are individually created, and most various other makers introduce technology from university research study organizations or research institutes or straight present modern technology from other companies to begin manufacturing. Due to the limited technological toughness of the producers themselves, they do not have a deep understanding of the polycarboxylic acid water reducer innovation they create, and it is difficult to adjust to different changes in basic materials and processes, and there is no other way to talk about the stability of item quality. Consequently, it is recommended that polycarboxylic acid water-reducing representative manufacturers actively accept universities and research study institutes to totally understand the numerous aspects impacting the efficiency of polycarboxylic acid water-reducing agent products, readjust the synthesis process criteria in a prompt manner to maintain product top quality, and reinforce technological reserves through joint or independent r & d to adjust to market need. In addition, the early release of polycarboxylic acid water-reducing representative basic material criteria and the stability of polycarboxylic acid water-reducing representative raw material rates are additionally extremely important to ensure the stability of polycarboxylic acid water-reducing representative item efficiency.
Technique 2: Idea in examination outcomes rather than item specifications
Some items that are incredible in the water-reducing agent specifications, and even items with outstanding test outcomes, may not be suitable for a particular task. As a matter of fact, some products may meet the needs of concrete material preparation for a particular project even though the examination outcomes are not very outstanding. Additionally, due to changes in basic materials, the test results throughout project bidding process can not represent the real application of the project. 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, will follow the arrangements of the pertinent nationwide requirements active; when trial-mixing concrete with admixtures, the raw materials utilized in the job will be utilized, and the examination items will be determined according to the style and construction demands. The test problems shall coincide as the building and construction conditions. When the raw products used in the job or the concrete performance demands transform, the trial-mixing test shall be conducted again.
(Cabr superliasticizer)
Method 3: Avoid contact in between polycarboxylic acid water reducers and iron products
For polycarboxylic acid water reducer makers and providers, special production devices and assembly line will be used to manufacture and intensify polycarboxylic acid water reducers, and polycarboxylic acid water reducers shall not be synthesized or compounded utilizing the very same production line as other water reducers. On top of that, the transport and storage space of polycarboxylic acid water reducers will not use iron products (other than stainless steel) yet plastic, glass and other products. Contact with iron sometimes causes changes in the performance of polycarboxylic acid water reducers.
Approach 4: Resolutely prevent mixing various other types of admixtures
It is strictly prohibited to blend 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, retarding and various other components) can only be executed by admixture makers or suppliers. The individual of the water reducer, that is, the concrete preparer, only needs to evaluate and store its relevant performance. No other parts may be intensified in it, nor may various other components be blended in it because of carelessness. It is definitely prohibited to use pumps and metering equipment for pumping and metering various other admixtures without cleansing. An additional meaning is that concrete mixing devices, transport automobiles, and pumping equipment are best used for concrete mixed with polycarboxylic acid water reducers. When sharing blending tools, transport lorries and pumping equipment, these tools should be extensively cleaned up prior to they can be utilized for concrete combined with other types of admixtures, and vice versa.
Approach 5: Purely gauge the water reducer and mix water
When preparing concrete mixes with polycarboxylic acid water reducers, the optimal water reducer dose and water consumption established by the laboratory should be purely determined. Do not boost the water reducer dosage or water intake at will to stay clear of negative sensations such as partition, blood loss, setting, and enhanced air material in the combined concrete, which will certainly influence the regular pumping construction and pouring top quality of the concrete.
The wetness consisted of in the raw products sand and stone aggregates must be accurately gauged and subtracted from the complete water usage to prevent damaging consequences triggered by incorrect detection of the wetness included in the sand and stone accumulations.
( concrete addtives)
Technique 6: Correctly encounter the compatibility issue of polycarboxylic acid water reducers and cement/admixtures
The compatibility problem of admixtures and cement/admixtures has a long history. For many years, the versatility research study work on naphthalene-based high-efficiency water-reducing representatives and their compound items has actually attained great results:
Through the effort of scientists, concrete preparers, admixture suppliers, cement and admixture suppliers, concrete producers and managers have actually jointly acknowledged this trouble, changing the scenario in which admixture producers and suppliers have actually always assumed all responsibilities.The incompatibility of admixtures and cement/admixtures is attributed to lots of influencing factors, and in-depth study has actually been performed on their influencing legislations. A series of reliable services have actually been explored for the certain conflict between admixtures and cement/admixtures.
Approach 7: Strictly manage the resonance distance and resonance time
Given that the downturn of concrete prepared with polycarboxylic acid-based water-reducing representatives is typically big and the thickness of the mixture is reduced, the vibration span and vibration time after the concrete combination is poured must be determined via experiments or ought to be led by experts. Intend the vibration distance is also little or the vibration time is too long. In that instance, it is very easy to create architectural problems such as a major decline in concrete air web content and severe stratification of the aggregate stage and paste stage.
Technique 8: Enhance first maintenance and prevent breaking.
On any kind of celebration, for any concrete mixture, initial and later upkeep after pouring is very crucial.
Polycarboxylic acid water reducer has little effect on the shrinkage efficiency of concrete; to put it simply, the enhancement of polycarboxylic acid water reducer does not excessively increase the shrinking of concrete, which does not imply that the concrete with polycarboxylic acid water reducer can loosen up and even cancel the maintenance.
Like concrete with various other admixtures, the second surface denigration, film covering or spraying of concrete with polycarboxylic acid water reducer after pouring and resonance is really reliable in avoiding its plastic contraction cracks. Continual 7d or 14d hydrating maintenance is not only needed for the normal growth of concrete stamina yet also a warranty to prevent its drying shrinking splits.
( foamed concrete)
In order to enhance the split resistance of concrete with polycarboxylic acid, it is also needed to include a certain amount of fiber, and this sort of concrete still needs excellent wet curing to guarantee that the structure does not crack.
Method 9: Construction and monitoring units must function very closely with concrete prep work and admixture suppliers
In the job, it is inevitable to run into various technological troubles, technological disagreements and also problems and disputes brought on by design mishaps. The supreme objective of all celebrations associated with the task is to guarantee the smooth progress of the task and the quality of the project. The background of polycarboxylic acid water reducers in manufacturing and application in actual tasks is very brief, and the built up design experience can be better. It is very easy to come across application problems and also bring about engineering accidents at this time, the building system or management unit requires to work carefully with the concrete preparation, polycarboxylic acid water reducer manufacturing and supply, and cement/admixture production and supply from a technological perspective and perform in-depth analysis to recommend reliable remedies.
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