PMID- 37895789
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231030
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 16
IP  - 20
DP  - 2023 Oct 22
TI  - Effect of Modified Cow Dung Fibers on Strength and Autogenous Shrinkage of 
      Alkali-Activated Slag Mortar.
LID - 10.3390/ma16206808 [doi]
LID - 6808
AB  - Alkali-activated slag (AAS) presents a promising alternative to ordinary Portland 
      cement due to its cost effectiveness, environmental friendliness, and 
      satisfactory durability characteristics. In this paper, cow dung waste was 
      recycled as a renewable natural cellulose fiber, modified with alkali, and then 
      added to AAS mortar. The physico-chemical characteristics of raw and modified cow 
      dung fibers were determined through Fourier transform infrared (FTIR), X-ray 
      diffraction (XRD), and Scanning electron microscope (SEM). Investigations were 
      conducted on the dispersion of cow dung fibers in the AAS matrix, as well as the 
      flowability, strength, and autogenous shrinkage of AAS mortar with varying cow 
      dung fiber contents. The results indicated that modified fiber has higher 
      crystallinity and surface roughness. The ultrasonic method showed superior 
      effectiveness compared to pre-mixing and after-mixing methods. Compared with raw 
      cow dung fibers, modified fibers led to an increase of 11.3% and 36.3% of the 28 
      d flexural strength and compressive strength of the AAS mortar, respectively. The 
      modified cow dung fibers had a more significant inhibition on autogenous 
      shrinkage, and the addition of 2 wt% cow dung fibers reduced the 7 d autogenous 
      shrinkage of the AAS paste by 52.8% due to the "internal curing effect." This 
      study provides an alternative value-added recycling option for cow dung fibers as 
      a potential environmentally friendly and sustainable reinforcing raw material for 
      cementitious materials, which can be used to develop low autogenous shrinkage 
      green composites.
FAU - Li, Kang
AU  - Li K
AD  - Joint International Research Laboratory of Deterioration and Control of Coastal 
      and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou 
      University, Fuzhou 350108, China.
FAU - Yang, Zhengxian
AU  - Yang Z
AUID- ORCID: 0000-0003-1703-4963
AD  - Joint International Research Laboratory of Deterioration and Control of Coastal 
      and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou 
      University, Fuzhou 350108, China.
FAU - Yan, Xueyuan
AU  - Yan X
AD  - Joint International Research Laboratory of Deterioration and Control of Coastal 
      and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou 
      University, Fuzhou 350108, China.
FAU - Xu, Liying
AU  - Xu L
AD  - School of Civil Engineering and Architecture, Southwest University of Science and 
      Technology, Mianyang 621010, China.
FAU - Briseghella, Bruno
AU  - Briseghella B
AUID- ORCID: 0000-0002-8002-2298
AD  - Joint International Research Laboratory of Deterioration and Control of Coastal 
      and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou 
      University, Fuzhou 350108, China.
FAU - Marano, Giuseppe Carlo
AU  - Marano GC
AUID- ORCID: 0000-0001-8472-2956
AD  - Department of Structural, Geotechnical and Building Engineering, Politecnico di 
      Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
LA  - eng
GR  - 51978171/National Natural Science Foundation of China/
GR  - FJHJF-2022-19/Fujian Ocean and Fishery Bureau/
GR  - 2021-P-031/Fuzhou Science and Technology Bureau/
GR  - GXRC-19045/Minjiang Scholar program of Fujian province, China/
PT  - Journal Article
DEP - 20231022
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC10608751
OTO - NOTNLM
OT  - alkali treatment
OT  - alkali-activated slag
OT  - autogenous shrinkage
OT  - cow dung fibers
OT  - ultrasonication
COIS- The authors declare no conflict of interest.
EDAT- 2023/10/28 11:43
MHDA- 2023/10/28 11:44
PMCR- 2023/10/22
CRDT- 2023/10/28 01:23
PHST- 2023/09/18 00:00 [received]
PHST- 2023/10/06 00:00 [revised]
PHST- 2023/10/20 00:00 [accepted]
PHST- 2023/10/28 11:44 [medline]
PHST- 2023/10/28 11:43 [pubmed]
PHST- 2023/10/28 01:23 [entrez]
PHST- 2023/10/22 00:00 [pmc-release]
AID - ma16206808 [pii]
AID - materials-16-06808 [pii]
AID - 10.3390/ma16206808 [doi]
PST - epublish
SO  - Materials (Basel). 2023 Oct 22;16(20):6808. doi: 10.3390/ma16206808.