Progress in Research on Carbon Nanotubes Reinforced Cementitious Composites

Table 2

Enhancement of CNTs to strength of cementitious composites.

Dispersion method	Matrix	CNTs (wt%)	Strength increase (%)		Researcher
			Compressive	Flexural
Sonication and polycarboxylate	Paste	0.2	—	20	Tyson et al. [67]
Sonication and gum arabic	Paste	0.08	—	71	Wang et al. [79]
Sonication, surfactant, and centrifugation	Paste	0.08	—	36	Metaxa et al. [153]
Sonication and acetone	Paste	0.5	11	—	Musso et al. [75]
Sonication and polymers	Paste	0.024–0.042	35	14	Cwirzen et al. [80, 154]
Sonication	Paste	1	10	—	Nochaiya and Chaipanich [102]
Sulfuric and nitric acid, SDS	Paste	0.1	7	—	Yu and Kwon [126]
Sonication and surfactant	Paste	0.5	−8	—	Collins et al. [77]
Sonication and surfactant	Paste	0.04–0.08	—	25	Konsta-Gdoutos et al. [71, 72]
Sonication and stirring	Paste	0.1	22	—	Bharj et al. [155]
Sonication, surfactant, and centrifugation	Paste	0.1	15	40	Xu et al. [73]
Sonication, NaDDBS, and 800 rpm stirring	Paste	0.5	15	—	Zuo et al. [156]
Silica fume	Paste	0.15	30	—	Kim et al. [157]
Sonication and superplasticizer	Paste	0.1	—	60	Abu Al-Rub et al. [95]
Ultrasonication and superficial active agents	Paste	0.2	29.5	34.5	Luo et al. [78]
Sulfuric and mixed acid	Mortar	0.5	19	25	Li et al. [66]
Sonication and surfactant	Mortar	0.02	15.9	20.7	Xu et al. [94]
Sonication and SDBS	Mortar	0.08	18	19	Liu et al. [158]
Polycarboxylate	Mortar	0.3	12	—	Melo et al. [76]
Conventional stirring	Mortar	0.01	10	24	Hamzaoui et al. [159]
Sonication and gum arabic	Mortar	0.08	20	38.5	Wang et al. [160]
Dry mixing	Mortar	0.02	11	—	Morsy et al. [161]
No information	Concrete	0.05	65	—	Yakovlev et al. [162]
Sonication	Concrete	0.02	2	—	Wille and Loh [163]
Sonication and chemical treatments	Concrete	1.25	72	—	Wang et al. [164]
Stirring 350 rpm	Concrete	0.02	24	24	Kerienė et al. [165]