Product characteristic
Product type
The major product is “Conch brand” portland cement clinker and “Conch brand” high grade portland cement, the common cement we are producing mainly are portland cement, ordinary portland cement, slag portland cement, composite portland cement. The special cement contain Sulfate resistance cement, moderate portland cement, low heat slag portland cement, highway portland cement, oil well portland cement, non-maglev portland cement, nuclear station portland cement, white cement, etc. To perform according to international cement standard, we have Type I/II and Type II/V based on ASTM C150 and P.I 52.5N , PⅡ-42.5R, PⅡ-42.5N base on EN-197 test standard, as well as other cement standard.
The performance of product
Conch Cement series product are all produced under New Dry Process System, with advanced QCX in line control system, equipped with advanced X-ray analysis apparatus,X-Fluorescence, automatic constant stress compressive, hydration heat testing apparatus, Atom Absorb Spectrum, and other full cement equipment. The majority of Conch subsidiaries have obtained the certificates of ISO9000：2000 Quantity system, and ISO14000 Environment System, strictly be conducted and controlled according to the Quality System Requirements, which make sure Conch Cement series product can be met with the request in the different market and its clients. We are not only producing the portland cement under China National Standard, but also producing portland cement which carry out according to ASTM of USA, EN of Europe, and ISO, in addition, we can develop the special portland cement product as per the various clients request.
Moreover, in order to guarantee the cement product performance, Conch Cement has built the first National Class Concrete Laboratory in Chinese cement field, dedicate to study and improve the cement product performance, in order to meet with the request of various clients, to broaden our managing concept “the first class product, serious service”. With continuous effort and progress, Conch Cement Product Quality has been well accepted by world wide clients, and obtained the import licenses, like European Union and other countries and regions. Meanwhile, Conch Cement series products have been authorized with China Famous Brand and exempted in quality checking.
The typical performance during using:
The performance of special cement
→ Highway portland cement:
Low hydration heat, steady high quality and strength, high freeze-thaw durability and corrosion resistance, good workability and adaptability with additives.
→ Middle-low hydration heat portland cement
Abrasion resistance; low drying-shrinkage; steady high quality, long term steady in color good workability and applicability with additives
→ Sulphate resistant cement
high sulphate corrosion resistance; low hydration heat; low permeability; steady high quality; good workability and applicability with additives
→ Well portland cement
Can be widely used in various part as per clients’ request; applicability with additives.
→ Non-magnetic cement
Self low magnetic content; applicability with additives; high ultimate strength
→ Special portland cement for nuclear generator plant
Adaptable with additives; can be used to make high-strength, high-density concrete, as well as high workability concrete
The characteristic of Cement Clinker:
High quality and steady; standard size and easy to grind; applicability with additives in grinding; a lot of industrial waste materials can be added while produce composite cement.
Remarks on using Conch Brand cement and clinker
Remark on using Conch Brand Cement
Conch Cement have the speciality of full type, high early strength, reasonable setting time, stable quality, good adaptability with additives, and so on. During construction , following items need to be paid attention to:
1.Pay attention to store, and avoid moisture.
During transportation and store it is requested to take necessary measures to avoid seeper in the hold of truck, to put waterproof cover in time; Cement should be stored in the dry place in order to avoid humidity into big lump; During using, we must follow the principle of “coming first, using first”, moreover, it is not apparoriate to store too long time, avoid moisture, which will cause quality decrease; In addition, cement is definitely not allowed to put together with sugar, fertilizer, and so on which will caused bad reaction on quality.
2.Cannot mix different type cement together
As different type, different grade cement have difference in quality, specification, it is requested to separately store, separately use. The various type and grade cement of different producers’ should not be used together mixing; meanwhile, the same type and grade cement of different producers’ cannot be used together.
3.To select certain type and grade cement reasonablly
It is requested to select certain type cement reasonablly as per the request of construction part and concrete strength grade, to avoid the status, like high grade cement make low grade concrete, or low grade cement make high grade concrete, which will cause bad workability and high slump loss, and lose in cost.
4.Stick to pre-testing of concrete
During using Conch cement, as different request on building structure, and part as well, it is requested to stick to pretesting of concrete, to find out the ratio; In case use new additives or change additive quantity, should make pretesting of concrete, try best to select good adaptability additives; In case some change from Conch specification items, we will inform you to make pretesting of concrete, in order to make sure concrete quality steady.
5.To pay attention to constructing in order and protect
Should strictly make control in adding the sand, gravel, water, and other materials, water should not with organic compound, sand should with low muddy, sand with high sulfate and alkali cannot be used; the design of mix ration of concrete should be as per the constructing design; keep uniformity when construction mixing，w/c ratio should be low, pound should be within measure, no paste spilling, moulding should be continued，to avoid concrete strength decline induced by cement unevenly distributing, eduction, bleeding and others.
Under high or low air temperature should control the temperature of admixture to avoid the rapid or slow setting time for concrete. After loss the plastic moulding concrete should be water and covered in time and keep wetness, to avoid concrete craze induced by to excessively dryness, meantime please note that no earlier or more for watering to avoid bad surface blending low strength, sand and peel appearing.
Remark on using Conch Brand Clinker
Conch clinker has the speciality of high early strength, high silicate mineral, stable quality and low hydration heat, meantime Conch clinker possess the ability of producing different typies of clinker. To use Conch clinker better please take note of the proceedings as follows:
1、To avoid moisture
During the transportation, store of the clinker, should seriously pay attention to the solutions of water proof; should transported with cover in rainy days; not allow to store openly in order to avoid moisture and low strength.
2、Using after test; coming first, using first
Even Conch brand clinker has stable quality, for the sake of avoid moisture and mix with differents producers’clinker which do impact on quality, it is requested to stick to the principl of using after test; To avoid strength decrease induced by too long time store and humidity please insist on the rule of “first coming,first using”. To fully exert the quality advantage of Conch clinker we suggest that Conch clinker should not be mixed with other clinker ,especially clinker from vertical kiln.
3、Request on testing
It is requested to make clinker testing according to China national standard, and cement industrial standard, like standard testing mill grading charts, the content of gypsum, blainess control, curing temperature,humidity and timing, criterion of compressive test, which make sure exact clinker strength test so that to guide cement produce and fully exert the quality advantage of Conch clinker.
4、To carry out specility testing, work out the best mix ratio
According to request of various type cement and its strength grade, it is important to select the appropriate additive and gypsum, request us to carry out specility testing, work out the best mix ratio, to make full use of clinker quality, lower the cement production cost.