Properties of cement mortar incorporating de-inking waste-water from waste paper recycling

Paper sludge, an environmentally sound alternative source of MK-based cementitious materials. A review

“…A reduction in the w/b ratio from 0.5 to 0.4 yielded unworkable pastes, which were too stiff to be tested without a superplasticiser. This loss of workability was likewise observed by Yan et al [41,58], who reported that the flow of mortar slurry decreased significantly from 140% to 25% with the addition of up to 20% dry and non-combusted paper sludge waste in mortars prepared with a w/b ratio of 0.7.…”

“…2), with temperatures of 500-900°C and retention times of 2-5 h. As a result of the foregoing, the chemical composition of activated paper sludge (APS) varies, as shown in Table 3. The majority silica, alumina and calcium oxide content may range from 11-44%, 8-29% and 4-54%, respectively [15,18,40,[55][56][57][58][59][60][61][62][63][64][65][66]. This variability of oxides in paper sludge wastes is directly related to the limestone/kaolinite ratio and the percentage of recycled paper used as raw material in the process.…”

Using wood fiber waste, rice husk ash, and limestone powder waste as cement replacement materials for lightweight concrete blocks

“…This parameter is critical in determining mechanical and transport properties of the most building products [17]. Results indicate that as the amount of WFW increases, the water absorption of the samples increases considerably (Fig.…”

The Interaction Effects of the Parameters on Optimization Design in Paper Production Waste Usage on Alkali-Activated Slag with Taguchi Method

“…4d), 7-day flexural strength enhanced by 16.3% and 28-day flexural strength declined by 11.2% with the increase of PS. This was because the lignin in PS slowed down the hydration, thus improving the shrinkage and stability of the mortar [64], and facilitating the 28-day flexural strength at the low [SiO 4 ] 4− concentration. At the high [SiO 4 ] 4− concentration, the increase in PS enhanced nucleation effect, making the 7-day flexural strength increase rapidly.…”