Synergistic enhancement of g-C3N4/CoAl-LDH nanoflower and mineral admixtures on the properties of nano-engineered cementitious composites - Details

author：

Lu, Lin (Lu, Lin.) ^[1] | Yang, Zhengxian (Yang, Zhengxian.) ^[2] (Scholars：杨政险) | Ning, Pingping (Ning, Pingping.) ^[3] | Marano, Giuseppe Carlo (Marano, Giuseppe Carlo.) ^[4] | Zhang, Yong (Zhang, Yong.) ^[5] (Scholars：张勇)

Indexed by：

EI Scopus SCIE

Abstract：

The　nano-engineered　cementitious　composites　(NCC)　were　prepared　using　g-C3N4/CoAl-LDH　nanoflower　(nano-CN/L),　in　combination　with　mineral　admixtures　including　fly　ash　(FA),　metakaolin　(MK),　and　ground　granulated　blast　furnace　slag　(GGBFS).　The　synergistic　effects　and　mechanisms　of　nano-CN/L　and　mineral　admixtures　on　the　mechanical,　chloride　penetration　resistance　and　air　purification　properties　of　NCC　were　investigated.　The　results　show　that　nano-CN/L　promotes　the　early　hydration　of　cementitious　materials　and　improves　the　composition　and　morphology　of　C-S-H　gel.　Furthermore,　the　filling　effect　of　nano-CN/L　significantly　optimizes　the　pore　structure　and　interfacial　crack　width　of　NCC,　thereby　eliminating　the　adverse　impact　of　FA,　MK,　and　GGBFS　on　its　early　mechanical　strengths.　Additionally,　nano-CN/L　enhances　the　chloride　penetration　resistance　and　NOx　removal　properties　of　NCC　through　its　strong　ion　adsorption　and　photocatalytic　activity,　respectively.　Incorporating　0.9　%　nano-CN/L　by　mass　of　cementitious　materials　reduces　the　chloride　diffusion　coefficient　of　NCC　at　curing　age　of　56d　by　26.9　%　and　increases　the　NOx　removal　ratio　by　11　times.　The　7d＇s　compressive　and　flexural　strengths　of　NCC　increase　by　13.6　%　and　4.6　%,　respectively,　compared　to　the　one　without　nano-CN/L.　As　a　novel　multifunctional　nanomaterial,　nano-CN/L　not　only　provides　a　new　pathway　for　extending　the　service　life　of　cementitious　composites,　but　also　injects　new　momentum　into　their　environmental-friendly　development.　©　2024　Elsevier　Ltd

Keyword：

Air cleaners Blast furnaces Chlorination Compressive strength Nanoclay Nanoflowers

Community：

[ 1 ] [Lu, Lin]Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University, Fuzhou; 350108, China
[ 2 ] [Yang, Zhengxian]Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University, Fuzhou; 350108, China
[ 3 ] [Ning, Pingping]Minsheng Group Urban Construction Development Co., Ltd., Sanming; 365000, China
[ 4 ] [Marano, Giuseppe Carlo]Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, Torino; 24 - 10129, Italy
[ 5 ] [Zhang, Yong]Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University, Fuzhou; 350108, China