Eignung des Buchenholzes zur Herstellung zementgebundener Holzwerkstoffe

Schwarz, H. G.; Simatupang, M. H.

doi:10.1007/bf02607194

Cited by 12 publications

(6 citation statements)

References 5 publications

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“…Many cement boards have been used as building partitions for over one century [1,2]. However, the specific gravity of cement boards is still high, more than 2000 kg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

“…In the recent years, by increasing the variety and numbers of the building materials many significant efforts have been done on implementation of different types of fibers particularly in concrete and cement panels. Many cement boards have been used as building partitions for over one century [1,2]. However, the specific gravity of cement boards is still high, more than 2000 kg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

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Using equal cross-section theory to investigate bending properties of cellulosic fiber reinforced cement panels

Ghasaei¹,

Masumi

Hejazi

et al. 2014

Journal of Industrial Textiles

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Cellulosic fibers, which are widely available in Iran, can be used as convenient materials for cement panel matrix reinforcing with respect to adequate mix design. This paper at the first stage presents a simple model for predicting the fiber reinforced cement panel behavior during flexural loads by implementing ''Equal Cross-section Theory''. At the second stage, experimental study was carried out to validate the proposed theory. In order to do the experiment, different types of cellulosic fibers were used as cement replacement of 1% by weight. In addition, to solve the problem of swelling of cellulosic fibers within cement matrixes, fibers were treated by UV/ozone and coated with sodium silicate. Compressive strength, flexural strength and density of cement composite samples were investigated in terms of different cellulosic fiber types including viscose, Leafiran, milkweed and hemp and the sodium silicate consumption amount. The results revealed that the use of cellulosic fibers diminished the density and compressive strength of the cement panel specimens. Improvement of flexural strength was only achieved by adding the hemp fibers into the cement panels which showed a good agreement with ''Equal Cross-section Theory'' outputs. Moreover, the reductions in the compressive and flexural strength of cement panels contained sodium silicate were much smaller than the cement panels with uncoated fibers.

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“…Many cement boards have been used as building partitions for over one century [1,2]. However, the specific gravity of cement boards is still high, more than 2000 kg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using equal cross-section theory to investigate bending properties of cellulosic fiber reinforced cement panels

Ghasaei¹,

Masumi

Hejazi

et al. 2014

Journal of Industrial Textiles

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“…Extracted organic wood components, in particular beech, have a high amount of water-soluble sugars and therefore, reveal an inhibiting effect on the cement hydration, resulting in a retarded reaction time, having a reduced maximum hydration temperature (Wei et al 2000b) and a lower strength of hardened cement paste (Schubert et al 1990a). Research in the field of wood/cement interaction has shown that cement composition (e.g., use of low-alkali cements), usage of cement admixtures (e.g., chemical cement setting accelerators) and pre-treatment of wood (e.g., steaming, hydro extraction, sodium hydroxide extraction or cement micro coating) help to compensate the abovementioned cement hydration inhibiting effect (Klatt 2012;Schubert et al 1990aSchubert et al , 1990bSchwarz and Simatupang 1984;Simatupang 1986;Wei et al 2000a).…”

Section: Introductionmentioning

confidence: 99%

“…Firstly, the paper introduces the investigated composite's cross section and the associated surface modification process of the LVL hollow sections. As in published research work, mainly the maximum cement hydration temperature, its temporal position and the compressive strength of hardened cement samples mixed with wood eluate water or wood chips are of interest (Schubert et al 1990a, b;Schwarz and Simatupang 1984), only little information about the hydration inhibiting effect of wooden boards with cement contact, examined by a determination of loose cement material remaining on the contact surface, is available (Simatupang 1986). However, to the authors' knowledge, no publication deals with the surface soundness determination of cement in contact with peeled beech veneer.…”

Section: Introductionmentioning

confidence: 99%

Wood-cement-composite behaviour of beech circular hollow sections

et al. 2020

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Beech laminated veneer lumber (LVL) circular hollow sections for use as nails in temporary geotechnical soil nailing systems were developed within this research. For the soil wall stability, beside a sufficient load carrying capacity of the nail cross section, a load carrying connection between the cement annulus and the nail is necessary. As cement grout ensures the bond between the nails and soil for the mobilisation of a soil reinforcement effect, a reliable connection between cement and wood surface is required. Occurring shear forces must be transferred from the nail into the soil through the wood-cement interface similar to reinforced concrete. Pull-off tests on clear LVL specimens with different cement and wood surface modifications as well as the results of large-scale push-out tests are presented. The results reveal a sufficient short-term bonding strength between the cement annulus and the wooden member to transfer the geotechnical loads, but also highlight the necessity of further research on long-term behaviour.

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“…However, this tree contains a relatively high amount of sugars and starch which could effect the quality of wood-cement boards produced. A previous study (Schwarz and Simatupang 1984) indicated that the amount of sugars and starch in wood decreases naturally during storage for a few weeks depending on species and environment. Fungi and microorganisms which infect rubberwood normally make use of these sugars äs their food (Norhara 1981;Hong et al 1983;Lim 1985).…”

Section: Introductionmentioning

confidence: 99%