Product or Service
NJAL-H Rapid Concrete Alkali Tester
Profile:Manufacturer - Producer|Ref:PSL210127YH | Country: China | Currency: | Export: Yes
Detection method: ISE (Ion Selective Electrode)
Test indicators: the alkali content of concrete and raw materials, means the equivalent content of sodium oxide Na2O (%)
Product Model: NJAL-H
Concrete materials contain alkali (potassium ion, sodium ion).When the concrete is in the sufficient moisture environment after a period of time, the concrete bases alkali (potassium ion, sodium ion) will react with the active silicon in the thickness aggregate. The reaction will cause the expansion of the structure and cracking, means the alkali-aggregate reaction. As the alkali-aggregate reaction will cause harmful effects to concrete structures, both domestic and foreign departments take great attention to concrete alkali content limits.
According to “Standard for Maximum Alkali Content in Concrete” CECS 53:93, “Standard for Durability Assessment of Concrete Structures” CECS 220:2007 and some other relevant standards, the concrete alkali content refers to the equivalent oxidation sodium content in the concrete ,by kg/m3. The alkali content of the concrete raw material refers to the equivalent oxidation sodium content in the concrete raw materials, by weight percentage (%). And the oxidation sodium content is equivalent to the sum of the oxidation potassium plus the oxidation sodium times 0.658, namely "the equivalent oxidation sodium content= Na2O + 0.658 * K2O".
The apparatus adopts Ion Selective Electrode method (ISE), and it uses the United States imported composite potassium Ion Electrode and composite sodium ions Electrode to rapidly test the alkali content (%) of the concrete (including fresh concrete, wet concrete, hard concrete powdery sample, etc) and the concrete raw materials (including the cement, chemical additive, admixtures, etc.) at room temperature
1. ‘Standard for Maximum Alkali Content in Concrete’ CECS 53: 93
2. ‘Standard for Durability Assessment of Concrete Structures’ CECS 220:2007
1.10minutes test cycle to rapidly test the concrete alkali content
2.Specific anti-ion interference agent, strengthen ion concentration and remove all kinds of metal interference effect in the same time
3.High precision potassium, sodium ions composite electrode, stable performance
4.Large LCD screen straight display, hand-held printer for instant printing, operation is reasonable
5.Unique self-diagnosis function, original PC analysis software
6.Great data storage capacity, can store 100 test data
7.Data record continuous, safe and reliable
Test object: fresh concrete, wet concrete and concrete raw material
NJAL-H rapid concrete alkali tester adopts ion selective electrode method (ISE method) rapidly to test the alkali content of the water-soluble matter, such as concrete, gravel, and additive.
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