000			a
999			_c19610 _d19610
003			OSt
005			20230710095437.0
008			230710b xxu||||| |||| 00| 0 eng d
040			_aAIKTC-KRRC _cAIKTC-KRRC
100			_921337 _aManickam, Karthikeyan
245			_aGrouting materials and practices for century-long corrosion protection of post-tensioned concrete bridges
250			_aVol.97(1), Jan
260			_aMumbai _bACC LTD _c2023
300			_a6-20p.
520			_aTypically, the post-tensioned (PTd) concrete bridges have an anticipated design life or corrosion-free service life of 100+ years. This paper highlights some of the concerns associated with the grouts and grouting practices, which have resulted in a large inventory of inadequately grouted PTd systems. Then, the relevant material properties and associated performance tests to qualify post-tensioning (PT) grouts are discussed. An experimental program on the fluidity, bleed resistance, volume change, and compressive strength of three commercially available PT grouts and one in-house developed PT grout is presented. Then, a compilation of existing standard specifications for PT grouts is presented. Following this, a set of comprehensive, and stringent performance specifications for PT grouts–to enable complete filling of PT ducts–was proposed. Finally, good grouting practices to achieve century-long corrosion protection for PT systems are recommended.
650		0	_94621 _aCivil Engineering
700			_921338 _aPillai, Radhakrishna G.
773	0		_dThane ACC Limited _x0019-4565 _tIndian Concrete Journal - ICJ
856			_uhttps://www.icjonline.com/editionabstract_detail/012023 _yClick here
942			_2ddc _cAR