Research Article

Compatibility of Pretreated Coir Fibres (Cocos nucifera L.) with Portland Cement to Produce Mineral Composites

Figure 3

SEM photomicrographs (400 μm) of untreated (a) and NaOH-treated (400, 100, and 30 μm) coir fibre surfaces (b–d).
290571.fig.003a
(a)
290571.fig.003b
(b)
290571.fig.003c
(c)
290571.fig.003d
(d)