1. Alkali-silica reaction test, accelerated mortar bar tester and test methods

2. 2-14A tests for evaluating the potential alkali-aggregate reactivity of classical alkali-silica, late expansive siliceous and alkali-carbonate aggregates is discussed.

3. A process for making concrete which is stabilized against alkali-silica reactivity (ASR) is provided.

4. Key words: concrete, aggregates, alkali–aggregate reaction, accelerated test methods, preventive measures, condensed silica fume.

5. The laterite concrete showed a net contraction when immersed inhot 1N NaOH solution (i.e. rapid alkali reactivity test).

6. Alkali-silica reactivity, a reaction between alkalies usually contained in the cement paste and siliceous aggregates, was positively identified in Nova Scotia in 1962.

7. ABSTRACT ALKALI-SILICA REACTION TEST, ACCELERATED MORTAR BAR TESTER AND TEST METHODS This invention is about accelerated mortar bar test device (1) and test method (100).

8. In the province of Québec, due to the particular geology and the historic use of high-alkali cements, a large number of concrete structures are affected by alkali-silica reactivity (ASR).

9. Key words: aggregates, alkali–silica reaction, concrete expansion, damage rating index, petrography, stiffness damage test, surface cracking.

10. Cracking due to alkali-silica reactivity has the appearance of lines on a road map and over time will develop a white crust on the surface.

11. Test for alkali

12. Admixtures (cont.) Alkali-silica reactivity (ASR) mitigation – These liquid Admixtures can mitigate and control ASR in concrete when using potentially reactive aggregates or sand with high or moderate-alkali cement or where there are sources of external alkalies.

13. An estimate of alkali reactivity and skid resistance can also be made.

14. Control of expansion in concrete due to alkali silica reaction

15. Alkali-silica reaction is avoided in the glass/concrete compositions.

16. Detection of alkali-silica reaction swelling in concrete by staining

17. The other concern is that certain Cherts undergo an alkali-silica reaction with high-alkali cements.

18. Key words: aggregates, alkali–silica reaction, concrete, petrography, expansion, stiffness, cracking.

19. Alkali-aggregate reactivity is a chemical reaction that occurs in some concrete structures.

20. Key words: alkali-aggregate reaction, alkali-silica reaction, alkali-carbonate reaction, petrography, testing of concrete aggregates, performance of concrete, survey, remedial measures.

21. Key words: alkali–silica reaction, modeling, inverse problem, assessment, suspension bridge, durability.

22. A report on the monitoring of test specimens exposed outdoors for Alkali Aggregate Reactivity is being prepared and will be completed by the end of March 2005.

23. SILICOAT researchers first identified a number of economical coating agents that block silica reactivity in biological media.

24. Lithium glass capable of minimizing the effects of alkali silica reaction in concrete.

25. Knowledge of alkali concentration in concrete pore solution is key for long-term evaluation of alkali-silica reaction (ASR) expansion.

26. Silica activities calculated for these rocks fall in the alkali olivine basalt field but are above the Ab–Ne silica buffer.

27. Positive test for alkali and for magnesium

28. Positive test for magnesium and for alkali

29. Positive test for alkali and for calcium

30. Lithium-based concrete admixtures for controlling alkali-silica reactions with enhanced set-time control

31. Bureau of Reclamation and by the author are evaluated for use with classical alkali-silica, late-expanding siliceous and alkali-carbonate reactive aggregates.

32. Key words: alkali–silica reaction, concrete expansion, fiber-optic, monitoring, reinforced concrete, stress, vibrating wire.

33. Key words: alkali–silica reaction, concrete; cracking, expansion, internal humidity, median barrier, sealer, silane, siloxane.

34. Especially the extraction with a small amount of alkali considerably increases the yield and reactivity of the extracts.

35. The project also addressed issues relating the reactivity of the new silica-based films with their steel and zinc substrates.

36. (9) More information on acid/alkali reserve test can be found in ‘Test No.

37. Key words: concrete, aggregates, alkali-aggregate reaction, standard and accelerated testing for AAR, fly ash, silica fume.

38. Result of alkali-silica reaction length change occurs on the concrete samples that used in construction industry.

39. Using different chemicals such as alkali and sulfite, polyphenols with higher yield and satisfactory reactivity towards formaldehyde can be extracted.

40. At last, these results are applied to the chemomechanical couplings induced by alkali-silica reaction in concrete.

41. Compositions for controlling damage to cementitious materials as a result of alkali-silica reactions (ASR) are provided.

42. For Alkali-Silica Reaction (ASR), chemical swellings depend on water content, and drying can have important consequences.

43. Alkali and alkaline earth metals do not interfere with the test.

44. Prototypes of columns were cast with different percentages of rebars and stirrups and various alkali–silica reactive aggregates.

45. Key words: alkali-aggregate reaction, British Columbia, concrete, aggregate, expansion test.

46. Some decades ago, the ‘invasion’ of European concrete by the alkali-silica reaction (ASR) took a hold in Denmark.

47. Low- and high-alkali, plain and air-entrained large concrete cylinders, 255 mm in diameter by 310 mm in length, were made with a highly alkali–silica reactive limestone.

48. Key words: air entrained, alkali–silica reaction, concrete, cracking, expansion, freezing and thawing, sealer, silane, siloxane, wetting and drying.

49. Methods of limiting hydroxyl ion concentrations or their effects in concrete pore solutions to interfere with alkali silica reaction

50. The degradation of concrete structures by the alkali–silica reaction (ASR) is highlighted in recent years in civil engineering.

51. The alkali content of particleboards bonded with phenolic resin can lead to problems after longer use due to its hygroscopicity and chemical reactivity.

52. Since 1989, field work and laboratory testing for alkali-reactivity has been undertaken on selected aggregate, rock, and concrete core samples throughout Newfoundland.

53. Laboratory expansion test results on concrete specimens are sensitive to alkali levels.

54. Such methods are useful in providing resistance to gels which form in concrete due to the alkali-silica (ASR) reaction.

55. The acid/ alkali reserve test measures the buffering capacity of the waste (9).

56. Wetting and drying significantly reduced alkali–silica reaction (ASR) expansion compared with constant humid storage; however, it promoted map-cracking.

57. “pH should not be adjusted during the test using an acid or alkali.”

58. Key words: alkali-aggregate reaction, expansion, fly ash, meta-sediments, mortar bar test, pozzolans, prism test, quarries, supplementary cementing materials.

59. A practical alkali-reactive aggreagate—Beijing Aggregate—was used to test the long-term effectiveness of LiOH in inhibiting alkali-aggregate reaction expansion.

60. The preferred compositions are impervious to water and acid, are resistant to alkali/silica degradation and reach high strength rapidly on setting.

61. This study follows another experimental study where different types of sealers were applied on plain and air-entrained large concrete cylinders made with high-alkali contents and highly alkali–silica reactive limestone aggregates.

62. A reference standard cloth was compared with samples that had undergone an alkali solubility test.

63. Results of the atomic-absorption behaviour of calcium in tungsten and in molybdenum in the presence of alkali, aluminium and silica are reported.

64. A simple titration method has been worked out for the rapid and accurate determination of silicic acid in silica sols and alkali silicate solutions.

65. As already described above, the acid/ alkali reserve test measures the buffering capacity of the waste.

66. an acid or alkali reserve test suggests that the classification as ‘Corrosive’ is not warranted, and

67. Sub-calcic alkali amphiboles from silica-saturated peralkaline rocks exhibit two main patterns of compositional variation, which we term the magmatic-subsolidus and oxidation trends.

68. Topics Definitions Requirements Corrosive Effects Irritant Effects Descriptive Statements pH Test Method Acid Reserve & Alkali Reserve Calculation

69. If testing is considered, a combination of acid/ alkali reserve test and in-vitro testing is recommended.

70. The extra reactivity of Cyclopropane

71. The alkali salts are preferably alkali formate and alkali acetate.

72. Silica gel

73. In 1934, Nordberg and Hood discovered that alkali borosilicate glasses separate in soluble (sodium borate rich) and insoluble (silica rich) phases if the glass is thermally treated.

74. In the Nandewar Volcano, for example, the parental magma is an olivine basalt, the differentiation trend is towards silica rich trachytes and very siliceous alkali rhyolites.

75. Moreover, silica promotes the release of SO2, while by co-combustion, it has a negative effect on SO2 release and a positive one on alkali release.

76. Colloidal silica is silica particles that are suspended in a liquid

77. X= alkali earth or alkali metal

78. The gender-indicating composition for use in the test is a mixture of alkali hydroxide and metallic aluminum.

79. Products of the invention can have various desired properties such as imperviousness to water and acid and be resistant to alkali/silica degradation while retaining adequate strength.

80. They differ in solubility and chemical reactivity.