To evaluate the effects of industrial by-products materials on the performance of porous concrete for plant growth, this study investigated the physical, strength, and freeze/thaw resistances of porous concrete for plant growth, prepared by replacing cement with blast furnace slag powder at 60% by weight, and replacing natural stone aggregates with coarse blast furnace slag aggregates at rates ...

Abstract: Porous concrete for low-impact development has long been studied the improvement of urban stormwater management. However, porous made using Recycled Concrete Aggregate (RCA) is still lacking, particularly concerning its strength and infiltration rates. Therefore, this paper aimed to design RCA with optimum rate without compromising strength. To fulfill aim, a laboratory study evaluati...

Soil aggregates include sand/silt/clay, water, ion and organic matter contents combined with natural dry/wet (D/W) cycling alters both the formation and function of intra-aggregate pore continuity, connectivity, dead-end storage volumes, and tortuosity. Surface aggregates in the 0-5 cm depths of most soils experience from 34 to 57 D/W cycles that exceed differences in water contents >10%. Both ...

In the UK, at present, the majority of aggregate materials, for all construction applications, are obtained from primary resources such as crushed rock and sand and gravel. Material extraction results in many adverse environmental impacts and utilisation consumes a finite natural resource. In the UK we also produce large quantities of waste and by-product materials, from industrial and domestic...

We study identification of combinatorial valuations from aggregate demand. Each utility function takes as arguments subsets or, alternatively, quantities of the multiple goods. We exploit mathematical insights from auction theory to generically identify the distribution of utility functions. In our setting, aggregate demand for each item is observable while demand for bundles is not. Neverthele...

The subject of this paper is the evaluation use waste material, which native soil. On example base ground taken from village Lipie (Podkarpackie voivodeship), soil-aggregate mixtures were prepared with a different degree addition natural aggregate. study analysed quantitative and qualitative parameters assessed their physical mechanical properties to determine suitability for construction nfras...

Timber supply has traditionally been modelled using aggregate data. In this paper, we build aggregate supply models for four roundwood products for the US state of North Carolina from a stand-level harvest choice model applied to detailed forest inventory. The simulated elasticities of pulpwood supply are much lower than reported by previous studies. Cross price elasticities indicate a dominant...

Through an experimental program of eighteen specimens presented in this paper, the bond strength between reinforcing bar and rubberized concrete was produced by adding waste tire rubber instead natural aggregate. The fine coarse aggregate replaced 0%, 25%, 50% with small pieces a tire. Natural replacement ratio, rebar size, embedded length, yield stress rebar, cover, compressive were studied in...

The increase in the number of road construction projects has led to an need for pavement materials (aggregate and asphalt). Currently it takes about 1.6 million tonnes/year asphalt, as well aggregate. Seeing these conditions, is necessary anticipate use waste or natural resources that have not been utilized optimally. In this study, fly ash (PLTU waste) was used aggregate Asbuton (Buton Island ...