Design of Low Carbon Footprint Alkali Activated Slag Cement Concretes for Marine Engineering Application in China

The paper covers the results of studies of the alkali activated slag cement concretes from the cements prepared under all-in-one technology to meet the requirements for concretes for marine engineering application. The compressive strength, weather resistance, biodegradability, bonding strength with steel reinforcement bar, steel reinforcement bar protection, chlorine ions diffusion parameters and resistance to corrosive exposure of 5% Na2SO4 solution were tested, which exhibit that alkali activated slag cement and concretes are very suitable for marine engineering applications.

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Enhancement of alkali-activated slag cement concretes crack resistance for mitigation of steel reinforcement corrosion

E3S Web of Conferences ◽

10.1051/e3sconf/202016606001 ◽

2020 ◽

Vol 166 ◽

pp. 06001

Author(s):

Pavlo Krivenko ◽

Oleh Petropavlovskyi ◽

Oleksandr Kovalchuk ◽

Igor Rudenko ◽

Oleksandr Konstantynovskyi

Keyword(s):

Crack Resistance ◽

Structure Formation ◽

Water Glass ◽

Sodium Metasilicate ◽

Steel Reinforcement ◽

Reinforcement Corrosion ◽

Slag Cement ◽

Alkali Activated Slag ◽

Activated Slag ◽

Alkali Activated

The paper is devoted to mitigation of steel reinforcement corrosion in alkali-activated slag cement (further, AASC) concretes, based on soluble sodium silicates (further, SSS’s), obtained from high consistensy concrete mixes. Enhancement of AASC fine concretes crack resistance due to modification by complex shrinkage-reducing additives (further, SRA’s) based on surfactants and trisodium phosphate Na3PO .12H2O (further, TSP) was proposed for mitigation of steel reinforcement corrosion. SSS’s were presented by sodium metasilicate (silica modulus 1.0, dry state) and water glass (silica modulus 2.9, density 1400 kg/m3). In case of sodium metasilicate the application of SRA composition “ordinary portland cement clinker – TSP – sodium lignosulphonate – sodium gluconate” provides enhancement of crack resistance starting from early age structure formation with restriction of drying shrinkage from 0,984 to 0,713 mm/m after 80 d. The effect is caused by reduction of water and by higher volume of crystalline hydrates. In turn, SRA presented by compositions “TSP – glycerol” and “TSP – glycerol – polyacrylamide” provide enhancement of AASC fine concretes fracture toughness during late structure formation with increasing ratio of tensile strength in bending to compressive strength up to 37 – 49 % if compare with the reference AASC when water glass is used.

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CONTROL OF ALKALI-ACTIVATED SLAG CEMENT FINE CONCRETES PROPER DEFORMATIONS BY COMPLEX MULTIFUNCTIONAL ADDITIVES BASED ON SALTS-ELECTOLYTES FOR PREVENTION OF STEEL REINFORCEMENT CORROSION

Collected scientific works of Ukrainian State University of Railway Transport ◽

10.18664/1994-7852.189.2020.213163 ◽

2020 ◽

Vol 189 (189) ◽

Author(s):

Pavlo Vasylovych Kryvenko ◽

Oleh Mykolaiovych Petropavlovskyi ◽

Igor Igorevych Rudenko ◽

Oleksandr Petrovych Konstantynovskyi

Keyword(s):

Steel Reinforcement ◽

Reinforcement Corrosion ◽

Slag Cement ◽

Alkali Activated Slag ◽

Multifunctional Additives ◽

Activated Slag ◽

Alkali Activated

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Modeling a Thermo-Stressed State of the Cast-in-Situ Low Carbon Footprint Alkali Activated Slag Cement Concrete Hardened under Hot Environment

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.525.482 ◽

2014 ◽

Vol 525 ◽

pp. 482-490

Author(s):

Lu Qian Weng ◽

Hai Lin Cao ◽

Pavel V. Krivenko ◽

Yue Guo ◽

O.N. Petropavlovsky ◽

...

Keyword(s):

Stressed State ◽

Carbon Footprint ◽

Low Carbon ◽

Cement Concrete ◽

Slag Cement ◽

Alkali Activated Slag ◽

Hot Environment ◽

Activated Slag ◽

Alkali Activated

Alkali activated slag cement concretes are low carbon footprint building mateirals, which can meet the requirements for sustainable development. The paper covers the results of modeling a thermo-stressed state of the cast-in-situ massive alkali activated slag cement concrete structure hardened under hot environment to meet the requirements for marine engineering application. The results show that alkali activated slag cement concretes have a substantially lower heat release than that of Portland, are suitable for cast-in-situ massive alkali activated slag cement concrete structure even under hot environment.

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