Pore Structure Characterization of Hardened Cement Paste by Multiple Methods

Table 2

Samples applied to multiple methods.

Methods		Samples	Test range	Mass (g)	Voxel/pixel size	Sample volume
Indirect method	Nitrogen sorption	NS1	2 nm to 60 nm	1.21
		NS2		0.88
		NS3		0.43
	MIP	MIP1	5.1 nm to dozens of microns	1.29
		MIP2		1.35
		MIP3		2.00
		MIP4		1.11
	Nuclear magnetic resonance	NMR1	1 nm to dozens of microns	69.23
		NMR2		5.42
Direct method	X-ray tomography	XCT1	1 μm to hundreds of microns		1.0 × 1.0 × 1.0 μm^3	1.0 × 1.0 × 1.0 mm^3
		XCT2			1.0 × 1.0 × 1.0 μm^3	1.0 × 1.0 × 1.0 mm^3
	FIB/SEM	FS1	10 nm to several microns		10 × 10 × 20 nm^3	6.85 × 8.80 × 8.08 μm^3
		FS2			10 × 10 × 20 nm^3	9.61 × 6.16 × 7.78 μm^3
	Helium ion microscopy	H1	1 nm to several microns		1.0 × 1.0 nm^2	8.0 × 8.0 μm^2
		H2			1.0 × 1.0 nm^2	8.0 × 8.0 μm^2