|Statement||by P. T. Sherwood.|
|Series||Road research technical paper ;, no. 61|
|LC Classifications||TE245 .S43|
|The Physical Object|
|Pagination||iv, 55 p.,  leaf of plates :|
|Number of Pages||55|
|LC Control Number||78324562|
Clare and Sherwood examined a cement-stabilized natural organic sandy soil and found that the retardation was probably due to an 'active' fraction of the organic matter. Book • 2nd Edition • Authors: role of organic matter in the formation of soil structure; effect of organic matter on the growth and development of plants; and influence of chemical and physicochemical soil properties on humus formation. The publication is a dependable source material for readers interested in the influence of soil. Mixtures of soil, cement and water will harden sufficiently to be used in place of stone for road-making, but some soils contain organic matter that can prevent the mixture hardening. RESULTS AND ANALYSIS The presence of organic content in soil has a major effect on strength properties of cement-soil block. The variation of compressive strength with different organic content is shown in Figure 7. The graph shows the overall increase of compressive strength which is greatly influenced by organic content.
The results obtained show that the inclusion of GGBS and CKD reduced swell and increases undrained shear strength irrespective of the percentage of organic materials due to cementation effect. However, results of the statistical studies show that the presence of organic matter influences the extent of performance of the cement, GGBS and CKD treated soils. Organic matter–disseminated sand (OMDS) is a widely distributed problematic soil in coastal areas of Hainan province, China. Its existence makes the installation of piles difficult and has the risk of insufficient bearing capacity. OMDS is different from other organic soils such as peat in terms of formation, mineral component, organic content, and forms of organic matters. Effect of organic matter on soil pH 42 Maize yield under conventional tillage and direct sowing, with and without 90 kg of N fertilizer 44 Herbicide costs in different production systems in Lempira Sur, Honduras 44 Organic matter content of a soil under different tillage management Soil stabilization aims at improving soil strength and increasing resistance to softening by water through bonding the soil particles together, water proofing the particles or combination of the two (Sherwood, ). Usually, the technology provides an alternative provision structural solution to practical problema. The simplest stabilization.
tend to have higher organic matter content than those in the south. Poorly developed soils or soil with accumulations of calcium carbonate characterise the Mediterranean basin. The European Soil Data Centre (ESDAC), managed by the EU’s Joint Research Centre (JRC), is a focal point for pan-European data on soil. According to a recent report. Source: World Neighbors, The addition of organic matter to the soil usually increases the water holding capacity of the soil. This is because the addition of organic matter increases the number of micropores and macropores in the soil either by “gluing” soil particles together or by creating favourable living conditions for soil organisms. The effects of organic compounds in preventing the hardening of soil-cement are now well understood but the effects of sulfate ions in the soil are still in some doubt. Experimental work carried out by Lambe and his co-workers (1) has shown that the strength of soil-cement can often be increased by the use of small proportions of metal. A word of caution when comparing your soil test organic matter levels with those discussed in this book. If your laboratory reports organic matter as “weight loss” at high temperature, the numbers may be higher than if the lab uses the traditional wet chemistry method. A soil with 3% organic matter by wet chemistry might have a weight-loss.