Does anyone know a good fly ash to use in a sulphur capping compound for breaking concrete cylinders?
80445
Have you looked into using the neoprene pads with steel caps.  I'm not sure about with cubic sample testing but that's what we used where i worked last summer.
141058
sodium sulfte is soluble, but barium sulfate would form as a precipitate. Thus\n\nBaNO3 + Na2SO4 -> BaSO4 + 2 NaNO3, or simply\n\nBa(2+) + SO4(2-) -> BaSO4
518890
Probably one of the best know hydrated compounds is Portland cement == Calcium sulfate pentahydrate\n\nCaSO4(5 H2O)
57796
Celestine is sometimes used to produce a red color in fireworks. Charcoal (carbon) is also used in pyrotechnics. Charcoal from soft woods, such as grape vine or willow, is good for fast-burning compositions like black powder, whereas charcoal from hard woods like pine are used to create long-lasting spark effects. \n\nIn any laboratory setting proper personal protection equipment should be employed. I recommend using safety glasses, a laboratory coat, full length pants and latex/polyethylene gloves. You shouldn't wear open toed shoes and loose articles of clothing that could snag. In cases were an explosion is possible, proper shielding is required. A fume hood is also required if hazardous fumes are expected.\nAlso, if you are resorting to using an online forum to recieve answers to potentially dangerous reactions, you obviously do not know what you are doing and should gently place down your little pyrotechnics and slowly back away.
562155
nothing? i think ferrous sulphate is stable at high temperature
165114
I think best way is choosing the High Silicon Cast Iron\nbecause of it`s unique corrosion resistant behavior in acidic conditions.
317088
I think you have the wrong test procedure.  Perhaps you could give the letter before the test number.  Is it ASTM D2828?  D2828 talks about concrete strength in airfields not corrosion.
122620
This is what I found:\n\nCALCIUM CHLORIDE\n\nCalcium Chloride can be used for and in the following:\n\nIce and Snow Melters. Production of Calcium Salts. Cold-weather concrete additive - Soil solidification - Tractor Tire weighting. Direct drying compound. Shoulder and base stabilization. Dustproofing and freeze-resisting ore and coal. Increases web strength of corrugating media.  Improves dye retention. An additive to oil well completion fluids. Cementing finished oil wells. Drilling mud additive and drying petroleum fractions.\n\nDust Control - Concrete Accelerator:\n\nCalcium Chloride has unique properties that make it ideal for maintaining unpaved roads and fortifying road bases for new construction. It is calcium chloride's ability to regulate moisture on road surfaces that is the key to building roads that last.\n\nCalcium Chloride keeps roads moist, day-in and day out, keeping nuisance dust down. Reduced pot-holing and rutting made possible by calcium chloride surface stabilization makes roads safer year round.\n\nStabilized calcium chloride roads can reduce aggregate loss by up to 75%. In addition, they significantly reduce the frequency and costs associated with periodic grading.\n\nUniform compaction and residual calcium chloride helps protect road bases from winter freezing and related frost heaving. Long known as an effective ice melter, calcium chloride lowers the freezing point of moisture in road bases to nearly 60 degrees below zero.\n\nCalcium Chloride protection of unpaved roads and road  bases is cumulative and long-tasting. The migration of calcium Chloride from road bases is minimal. Studies have shown that calcium chloride is still present and providing stabilization in road sub-bases nearly 30 years after initial construction.\n\nCalcium Chloride maintains workability in concrete with reduced water usage. In addition, faster setting means that manpower and labor hours can be reduced. And the number of forms required for a project can be minimized, since they can be re-used faster at the job-site.\n\nCalcium chloride is commonly used in industry as an accelerator.  Accelerated rates of strength development allow for earlier removal of forms, earlier finishing operations and availability for use.  This also allows for shorter curing and protection periods which can be advantageous, especially in cold weather conditions.  Briefly, calcium chloride reduces initial and final setting, resistance to sulfate attack and bleeding.  Tensile and flexural strength are slightly decreased.  However, compressive strength, water tightness and modulus of elasticity are increased.  Resistance to damage by freezing and thawing is improved early but may be less resistant at later ages.\n\nOne of the major problems encountered with the use of calcium chloride as an admixture is the effect that the chlorides have on reinforced concrete.  Prestressed concrete can contain no significant amount of calcium chloride.  The effect of corrosion hat the presence of chlorides may produce can be controlled if appropriate measures are taken.\n\nIce Melters\n\nCalcium Chloride Liquid: a liquid brine in its natural state and is converted into a dry material by removing the water. It quickly absorbs water from the atmosphere. When calcium chloride is converted into a liquid, it gives off heat. Calcium chloride will melt ice at temperatures of-25° F.\n\nThe growing need for corrosion-inhibited deicers has prompted manufacturers to explore their production.  One example of this is a new corrosion-inhibited grade of liquid calcium chloride designed to meet or exceed deicers standards in all respects.  In addition to providing low corrosion versus salt, it has calcium chloride's operational benefits in that it continues to melt snow and ice at 20 degrees F, the temperature at which salt becomes an inefficient deicer.\n\nThose using corrosion-inhibited calcium chloride for deicing and anti-icing, report that it aggressively melts snow an
628182
HCl would work best.  Sulfamic acid is a weak acid that although easier to handle is more expensive and less effective.  HCl is cheap, but when concentrated can fume, and is more likely to produce Chlorine gas if you acidify something chlorinated with it.
83085
"By weight measure, black powder is made of seventy-five parts saltpeter finely ground, fifteen parts charcoal, and ten parts sulfur. All ingredients must be fine ground separately. This can be accomplished with either a mortar and pestle, or with a hand-cranked flour mill. Never mix all three ingredients before grinding unless you want to turn your mill into a deadly grenade, or your mortar into a cannon that can blow off your fingers or even your hand."\n\nDont forget that gunpowder is a low-explosive. it will not explode in the open atmosphere, but will explode under compretion. In other words, dont keep it in an airtight container.\nBE CAREFULL!!! Remember, flamible things tend  to burn!;-)
974698
Fast drying type like cyanoacrylate type used to glue golf club ends to fiberclass shaft & flites on hunting arrows U can find it in stores that sell that kind of stuff.
197233
Try gelest.com, they manufacture a LOT of Si compounds for many applications.
817601
try the local chemist....
407959
If you're placing the slab yourself, be sure to follow the mixing directions very closely, and do not add more than the maximum recommended amount of water. The steel recommendations are okay - if you're serious, you can put epoxy-coated welded wire fabric reinforcement in it. To control cracking, tool joints into the concrete at the same time that you are finishing it (making it smooth), so that it looks like the sidewalks that you are used to seeing. Beyond controlling the water content, the next to easiest way to have a high quality concrete is to cure it properly. If you use a bagged mix, there should be recommendations on the bag - be sure to follow them!\n\nIf it's a large area, consider having a professional do the job. Make sure that they are recommended as doing a good job.\n\nAlso - avoid using any de-icing salts on your new concrete, especially during its first winter. Anything that has chloride in it is a culprit, but rock salt is the worst. It is difficult to find something without any chlorides (and expensive when you do find it) so look for bags that advertise as being friendly to concrete.
1103908
you mean into a chloride?\neasy just add concentrated hydrochloric acid.the chloride will precipitate. and the sulfate will come out as hydrogen sulfide gas and water. maybe you need hydrogen to be passed in the mixture.\nna 2(so4)   + hcl  =      nacl   + h2s  + h2o
124635
Matt slabs or Mass Concrete
388806
try \nTHUNDERBIRD EPOXY\nENDURANCE BOW FINISH.\nlink below.