boric acid additive in cement

(PDF) Boron sources as sintering additives for alumina ...

oxide, boric acid, sodium borosilicate, magnesium borate and boron carbide) in hydratable alumina-bonded castables in order to better understand their role as sintering additives and develop enhanced

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US20060254466A1 - Dual function cement additive - Google ...

US20060254466A1 US10/570,377 US57037706A US2006254466A1 US 20060254466 A1 US20060254466 A1 US 20060254466A1 US 57037706 A US57037706 A US 57037706A US 2006254466 A1 US2006254466 A1 US 2006254466A1 Authority US United States Prior art keywords retarder cement …

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Effect of boric acid content on the properties of ...

Jul 30, 2019· Effect of boric acid (BA) content on the properties of magnesium phosphate cement was evaluated. • Specimens were molded with different BA contents using MgO calcined at 900 and 1110 °C. • Effect of the BA concentration on the properties of MPC was evaluated. •

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Function Synergy of Cross-Linked Cationic PVA Polymer to ...

Thus, a cationic polyvinyl alcohol (PVA) polymer, modified by glyoxal and boric acid, was discovered due to its excellence in associating with the FLA A additive for controlling the free cement-based material water amount and preventing the chelating effect of FLA A chains on the surface of the cement-based material. Glyoxal/boric acid-modified ...

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Effects of Adding Boron Compounds to Glycol Based Grinding ...

Boric acid may form anionic tetrahedral diesters with diols or divalent ligands [20] . Borates form neutral esters in apolar solvents and form anionic borate ester in water. Borate esters almost do not form at physiological pH (7.5) levels; also they split in a strong acid medium [20] . PH level of fresh cement mortar is at least 12.5 [21] .

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(PDF) Effect of boron-containing additives on rheological ...

The boric acid additive is reported to improve asphalt's penetration, softening point and resistance towards wearing resulting from air effect (Lentz, 1945 ). Boron-

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How to Use Muriatic Acid to Clean Concrete | Hunker

Apr 17, 2018· Muriatic acid must be diluted with water before use. The easiest dilution to remember is 1 cup of acid to 1 gallon of water. If you need a stronger solution, mix 1 part acid to 10 parts water. Always add the acid …

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US3619221A - Amine formate accelerator additives for ...

Water-soluble salts of amines and formic acid are added to Portland cement compositions (e.g. concrete) to accelerate the setting time thereof. The additives exhibit a particular effectiveness for offsetting the set-retardation effect of waterreducing, set-retarding agents, (e.g. lignosulfonates) employed in Portland cement compositions.

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Additive For Concrete Called Cn

A concrete with specified strength at lower cement content thus saving on the cement. Water reducers are mostly used in hot weather concreting and to aid pumping. Water reducer plasticizers are hygroscopic powder, which can entrain air into concrete. Air entraining admixtures entrain small air bubbles in concrete…

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Re-evaluation of boric acid (E 284) and sodium tetraborate ...

Oct 24, 2013· These additives are authorised in EU for use as preservatives of sturgeon eggs (caviar) up to a maximum concentration of 4 g boric acid/kg. Previous evaluations have been performed by the Scientific Committee for Food (SCF) in 1979, 1988 and 1992, Joint FAO/WHO Expert Committee on Food Additives (JECFA) in 1962, EFSA (2004, 2005a, b, 2012) and ...

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Function Synergy of Cross-Linked Cationic PVA Polymer to ...

and mechanism of AMPS-type fluid loss additive used in cement-based materials. Furthermore, the PVA polymer, modified by glyoxal and boric acid, abbreviated as PVAGB (or PVA-G-B), which could …

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Composite Cement - an overview | ScienceDirect Topics

Additive function; Masonry cement: Lime: Boric acid: Adjusts pH: Portland sodium silicate cement: Sodium silicate: Organic liquids: Accelerates set, reduces porosity: Portland pozzolanic cement: Reactive silica: Sulphate: Reacts with Ca(OH) 2, reduces porosity: Portland blast furnace slag cement: Slag: Sulphate: Reacts with Ca(OH) 2, latently ...

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Function Synergy of Cross-Linked Cationic PVA Polymer to ...

and mechanism of AMPS-type fluid loss additive used in cement-based materials. Furthermore, the PVA polymer, modified by glyoxal and boric acid, abbreviated as PVAGB (or PVA-G-B), which could be completely swelling-soluble in water (PVA, degree of polymerization, i.e., DP was 1788), was used for research on its physicochemical associa-

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US8258085B2 - Oil-well cement fluid loss additive ...

US8258085B2 US12/156,394 US15639408A US8258085B2 US 8258085 B2 US8258085 B2 US 8258085B2 US 15639408 A US15639408 A US 15639408A US 8258085 B2 US8258085 B2 US …

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US5009269A - Well cement fluid loss additive and method ...

A fluid loss additive for addition to a cement slurry used in cementing a casing string in a wellbore. The additive reduces loss of water from the slurry into the formation, resulting in a better cement job. The additive is comprised of partially hydrolyzed polyvinyl acetate polymer, calcium sulfate, a crosslinker for the polymer, and optionally a defoamer.

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Boric Acid General Fact Sheet

Boric acid and its sodium borate salts are pesticides that we can find in nature and many products. Borax is one of the most common products. Boric acid and its sodium salts each combine boron with …

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(PDF) Utilization of Boron Waste as an Additive for Cement ...

It was concluded that BW can be used as a cement additive after decreasing boron oxide and water-soluble impurities. ... effects of the usage methods of boric acid at different concentrations on 3 ...

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Cement Retarders - Additives & Products for Oil & Gas

Boric acid is normally run with MTR-14 retarder. LTR-10 It can be used to retard the thickening time of all classes of cement and Pozzolana cement at low temperature up to 200°F (93°C)

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The Effect of Boron and its Compounds on Setting of ...

The aim of this work is to study the influence of boron and its compounds, boric acid and borax, on the hydration of Portland cement. The samples – cement paste modified by the addition of boron, borax and boric acid …

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Boric acid as a lubricating additive in fuels and in ...

2018 (English) Independent thesis Advanced level (professional degree), 20 credits / 30 HE credits Student thesis Abstract [en] Boric acid based fuel and oil additives were investigated in this study, with the aims to gain a deeper understanding of how the boric acid fuel additive behaves, to investigate the effect of low rates of fuel additive …

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(PDF) Boric Acid Degradation of Reinforced Concrete

concrete and boric acid effect on cement and concrete. It provides an overview of leaching of . FINAL . 1-2. cement-based materials by aqueous, including acidic, solutions, the factors and ...

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The effects of boric acid and phosphoric acid on the ...

Boric acid is also a component of dental cements, commonly incorporated into glass (as an ingredient in the melt) and occasionally added to the powder component of the glass-ionomer cement ...

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Ordinary Portland Cement - an overview | ScienceDirect Topics

According to Portland Cement, Ordinary Portland Cement (GB175-1999), the national standard, the strength grades of ordinary cement can be divided into: 32.5, 32.5 R, 42.5, 42.5 R, 52.5, 52.5 R, and their ages should be no less than the numerical value in Table 4.3.The initial setting time of ordinary cement should not be earlier than 45 min, and final setting time should not be later than 10 h.

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Boric Acid and Borax in Food

Boric acid and borax have long been used as additive in various foods. Since boric acid and borax are effective against yeasts, and to a much lesser extent, against moulds and bacteria, they can be used to preserve food products. In addition, both of these additives can be used to increase the elasticity and crispiness of foods as well as ...

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