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C1777-20 Standard Test Method for Rapid Determination of the Methylene Blue Value for Fine Aggregate or Mineral Filler Using a Colorimeter methylene blue adsorption test~ mineral fillers~ ~ methylene blue~ Products and Services / Standards & Publications / Standards Products.
Research and field experience have shown that fines free of clay and other harmful materials can be non-detrimental, and even beneficial, for concrete properties. A proposed new ASTM International standard will be used to distinguish between harmful and non-harmful fines in construction aggregates.
The Methylene blue test (BS EN 933-9) provides an assessment of the quantity of clay in a sample of rock or aggregate. No limits are given in UK standards as it is not considered sufficiently precise for the purpose of determining harmful fines content, see BS EN 12620 Annex D. The French National Standard has a limit of 1%.
The Methylene blue value (MBV) test set is used to determine the swelling clay content in fine aggregates thus to evaluate the aggregate cleanliness degree. This test is suitable for aggregate size less than 2.36mm or 0.15mm, when the 0.075mm sieving test through rate less than 3%, then no need to perform this test.
Methylene blue value of fine aggregate. Methylene blue value reflects the amount of clay minerals in aggregate samples. Methylene blue solution is successively added to fine aggregate which is being agitating in water. The presence of free dye solution can be checked with stain test on a filter paper. Biological staining
Mar 19, 2020· Fine aggregates in Australia must comply with AS2758.1.1 In light of this specification, Cement Concrete Aggregates Australia (CCAA) in 2007 made efforts to determine the applicability of this standard towards manufactured sands.2-6 It recommends several useful tests, including sand equivalent (SE) and methylene blue value (MBV).
The test is performed for determining the clay content in the fines fraction of the aggregates. The set includes: 47-D0439/C1 50 cc burette with stopcock 47-D0439/C2 Support base with clamp 47-D0439/C3 Filter paper. Pack of 100 discs 47-D0439/C4 Glass rod 300x8 mm dia. 86-D1075 Borosilicate glass beaker 1000 ml 47-D0439/C9 Methylene blue. 250 ml
The fine granular structure and surface activity of clay minerals increase the amount of mixing water needed to provide workability in concrete. Even when the microfine material percentage in fine aggregate is low, the methylene blue value of the fine aggregate increases when materials of clay origin are present.
Base Course Aggregate AASHTO T 330-07 Methylene Blue Scale . 6 Methylene Blue Equipment h ght e DR eter mer c ube te l tube ringe ringe ter edropper ene ue on. 7 Grace Methylene Blue Test Weigh 20g of sample***and 30g MB solution. Mix them and shake for 5 min. Take solution into syringe that has 2 micrometer filter.
This test adds quantities of a standard aqueous solution of methylene blue (MB) dye (Figure 2) to a sample of dry fine aggregate passing the No. 200 (0.075 mm) sieve until adsorption of the dye ceases. The MB solution is titrated step wise in 0.5 ml increments from the burrette into a continually stirred fine aggregate suspension.
In road construction the general term fines is used to describe particles passing the 0.063, 0.074 or 0.08 mm sieve. Some types of fines are considered to be relatively inert and have almost no effect on pavement performance, whilst the presence of even small amounts of others can significantly affect the stiffness and freezing–thawing behaviour of unbound and hydraulically bound layers.
The purpose of this study was to implement a new, rapid field method to effectively and accurately detect harmful clay minerals in aggregate fines by using the modified methylene blue (MMB) test. The focus of this study was based on existing knowledge that expansive, or swelling, clays can cause performance problems in pavements whose coarse
The Methylene Blue Test Set is used for determining the Methylene Blue value of 0/2 mm/ fraction in fine aggregates. Set Consists of. High Speed Agitator Motor, 400/600 r.p.m. Stirring Propeller, Ø 70 mm 4 flanks. Glass Burette, 50 ml x 0.1 ml. Burette Holder and Stand. Filter Paper, 1 pack (100 pcs.), 125 mm dia, 95 g/m2, 0.20 mm thickness
Methylene Blue Powder Reagent is a 25g bottle used to mix with distilled water to create a Methylene Blue solution for methylene blue value (MBV) testing to determine the presence of the potentially harmful materials in fine aggregate.The 25g powder reagent makes enough solution for over 500 tests. It is included with the Methylene Blue Test Kit.
The Test Set is used for determining the Methylene Blue value of 0/2 mm fraction in fine aggregates. UTGC-0886 Type B methylene blue powder has a dye content ≥82 %(spectrophotometrically). Filter paper, methylene blue powder and kaolinite should be ordered separately.