Reliability Evaluation of Pavement Life-Cycle Assessment Model

Table 7

Parameter uncertainties of the cement pavement LCA model.

Stage	Parameters	Uncertainty^1	Distribution form
Material production	Cement production	—	Probability density function
	Aggregate production	UF = 1.62	Lognormal distribution
	Mixing	UF = 1.47	Lognormal distribution
	Cement amount	UF = 1.09	Uniform distribution
	Steel amount	UF = 1.09	Uniform distribution

Note. 1: uncertainty parameters in the remaining stages are consistent with those in Table 2.